Stone Mountain
Stone Mountain Ltd. designs, manufactures, and sells ruggedized IP68/MIL-STD 810H audio communications equipment — including Bluetooth and wired speaker microphones — for transportation, first responder, and industrial customers requiring compatibility with major LMR radios and PTToC platforms.
- Company typePrivate
- Founded1999
- HeadquartersHuddleston, United States
- Headcount11–50
- GTM typeB2B
- OfferingHardware or Manufacturing
What Stone Mountain does
Stone Mountain, Ltd. is a privately held Virginia-incorporated designer and manufacturer of ruggedized audio communications equipment, founded in 1999 and operated from a single facility at 1597 Eagle Point Road in Huddleston, Virginia. The company builds IP68- and MIL-STD 810H-rated remote speaker microphones (RSMs), Bluetooth headsets, USB microphones, full-duplex transceivers, and tablet docking stations that integrate with major Land Mobile Radio (LMR) platforms from Motorola Solutions, Harris/L3Harris, Kenwood, Tait, BK Technologies, Vertex, and E.F. Johnson, as well as Push-To-Talk over Cellular (PTToC) applications from Zello, Kodiak, ESChat, TASSTA, Sonim, T-Mobile, Microsoft Teams, Samsung, and others. Its product portfolio spans the BluSkye Bluetooth RSM, UVox Pro USB-C RSM, Elite and Epic wired RSMs, Phoenix LMR, TruBlu Bluetooth headset, SpeakEZ full-duplex ISM 900 MHz transceiver, and NuDock tablet dock.
The company's revenue model is hardware sales at one-time/perpetual pricing between $89 and $249 per unit, plus accessories and enterprise/contract pricing on request, with Net 30 terms. Go-to-market is direct-to-customer through the stonemountainltd.com e-commerce storefront, a dedicated enterprise phone line (540-297-6434 x200), and trade show presence at events such as STN Expo (Booth #500, July 2026). Marketing support consists of organic social on Facebook, YouTube, and LinkedIn, plus a testimonial-driven website. Customer concentration spans transportation (concrete, waste, ready-mix, transit), first responders (fire/rescue, sheriff special operations), industrial (mining, construction, crane), and commercial (healthcare, aviation maintenance) segments, with named enterprise deployments ranging from 50 to 550 vehicles or personnel per customer. Stone Mountain positions on proprietary ruggedization know-how accumulated over 25+ years, custom development capability, US-based assembly and support, and the breadth of its LMR/PTToC integration partnerships, with no disclosed revenue, funding rounds, or executive team information in the public record.
Stone Mountain firmographics
Firmographics- Name
- Stone Mountain
- Legal name
- Stone Mountain, Ltd.
- Website
- https://stonemountainltd.com
- Company type
- Private
- Founded year
- 1999
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Stone Mountain Ltd. designs, manufactures, and sells ruggedized IP68/MIL-STD 810H audio communications equipment — including Bluetooth and wired speaker microphones — for transportation, first responder, and industrial customers requiring compatibility with major LMR radios and PTToC platforms.
- Ownership category
- akta.pro rank
Stone Mountain industry classification
Industry- Product category
- Ruggedized Audio Communications Hardware
- NAICS
- Other Communications Equipment Manufacturing (33429)
- SIC
- Communications Equipment, Nec (3669)
- akta.pro primary industry
- Microphones, Headsets & Audio Input Devices (HDACAFAH)
- akta.pro secondary industry
- Rugged Smartphones & Push-to-Talk Devices (HDACALAI)
Keywords
Where Stone Mountain is headquartered
LocationHeadquarters
- HQ city
- Huddleston
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Stone Mountain business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Hardware Sales: Stone Mountain generates revenue primarily through the sale of ruggedized speaker microphones, transceivers, and tablet docking stations. Products are sold as one-time purchases with various pricing tiers based on product complexity and features.
- Accessories: Sale of complementary accessories including earpieces, mounting brackets, charging cables, and replacement parts for speaker microphones and docking stations.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| One time/ perpetual license | Pay-as-you-go | BluSkye Bluetooth Speaker Microphone - $240.00 |
| One time/ perpetual license | Pay-as-you-go | UVox Pro USB Speaker Microphone - $175.00 |
| One time/ perpetual license | Pay-as-you-go | Elite Wired Speaker Microphone - $155.00 |
| One time/ perpetual license | Pay-as-you-go | Epic Wired Speaker Microphone - $170.00 |
| One time/ perpetual license | Pay-as-you-go | Phoenix LMR Speaker Microphone - $89.00 |
| One time/ perpetual license | Pay-as-you-go | TruBlu Bluetooth Microphone - $115.00 |
| One time/ perpetual license | Pay-as-you-go | SpeakEZ Full Duplex Transceiver - $249.00 |
| Other | Pay-as-you-go | NuDock Tablet Docking Station - Contact for pricing |
Go-to-market motion1 record
Distribution channels3 records
Marketing channels6 records
Stone Mountain product offering
Product offeringCore offering
Stone Mountain designs, assembles, and sells ruggedized audio communications accessories — primarily Bluetooth and wired remote speaker microphones, a full duplex wireless transceiver, and a tablet docking station — built to IP68 and MIL-STD 810H standards. The products integrate with Land Mobile Radio systems from Motorola, Harris, Tait, Kenwood, and others, and with Push-To-Talk-over-Cellular platforms such as Zello, Kodiak, ESChat, and TASSTA, serving transportation, first responder, industrial, and commercial customers worldwide.
Product overview
Stone Mountain Ltd. offers a comprehensive portfolio of ruggedized audio communication accessories designed for transportation, first responder, industrial, and commercial professionals. The product line includes Bluetooth speaker microphones (BluSkye), USB-connected microphones (UVox Pro), wired speaker microphones (Elite, Epic, Phoenix LMR), compact Bluetooth headsets (TruBlu), and full duplex transceivers (SpeakEZ). These products integrate with major PTToC apps (Zello, Kodiak, ESChat, Tassta), land mobile radio systems (Motorola, Harris, Kenwood), and mobile operating systems (Android, iOS, Windows). The NuDock tablet docking station serves as an accessory that transforms tablets into complete communication solutions. All products meet IP68 and MIL-810H durability standards and are designed, assembled, and supported in Virginia, USA.
Differentiator
Problem solved
Functional benefit
Brands
- Blu*Skye*®: Bluetooth® remote speaker microphone series - the loudest, most rugged Bluetooth RSM in the world, designed to meet IP68 and MIL-810H standards
- U*Vox*™ Pro
- Elite™
- Epic™
- Phoenix LMR™
- Nu*Dock*™
- Tru*Blu*™
- Speak*EZ*™
- Hanz*Free*™
Products and services
- BluSkye Bluetooth Speaker Microphone A rugged IP68/MIL-STD 810H Bluetooth remote speaker microphone (RSM) for enterprise and public-safety users, supporting Android, Windows, and LMR operating systems along with major PTToC apps (Zello, Kodiak, ESChat, Tassta, Celrado). Delivers up to 116+ dB audio output, 12–42 hour battery life, NFC-based Quick•Pair Bluetooth pairing, and a SafT•Strap breakaway safety lanyard. Priced at $240.
- UVox Pro USB Speaker Microphone A rugged IP68/MIL-STD 810H USB-C speaker microphone with interchangeable U•Mod USB connectors, 24-hour battery life, and support for Zello, Kodiak-based apps, TDC, and Wave PTX across phones, tablets, and docking stations. Priced at $175.
- Elite Wired Speaker Microphone A rugged wired RSM for cellular devices using PTT apps, featuring a 3.5mm connector, ~30 hour battery life, Tru•Dock cradle charging support, Pro•Clear DSP noise cancellation, and Call•Check message record/store/playback. Priced at $155.
- Epic Wired Speaker Microphone A rugged IP68/MIL-STD 810H wired RSM built for Sonim handsets with the SecureAudio Gen 1 connector (XP5s, XP5Plus, XP8, XP10), supporting 100% hands-free operation. Priced at $170.
- Phoenix LMR Speaker Microphone A rugged IP68/MIL-STD 810H speaker microphone for Land Mobile Radio critical communications, supporting Motorola, Harris, Tait, Kenwood, BK Technologies, Vertex, and E.F. Johnson radios, with All•Clear active noise reduction, Call•Check, and Mag•Shield acoustic shroud. Priced at $89.
- TruBlu Bluetooth Microphone A compact wireless Bluetooth PTT microphone supporting LMR platforms, Android, and iOS devices running PTToC applications, with a 3.5mm audio jack for discrete communication and full duplex phone calling. Priced at $115.
- SpeakEZ Full Duplex Transceiver A full duplex hands-free wireless transceiver with detachable headset that creates a secure peer-to-peer communications network using 900 MHz ISM band frequency hopping — without requiring LMR or cellular infrastructure — supporting up to 40 talk groups and 100 users across 3,000+ feet line of sight. Priced at $249.
- NuDock Tablet Docking Station A tablet docking station that converts tablets up to 11 inches into a complete PTToC communication solution when paired with Stone Mountain speaker microphones, offering multiple mounting and power options and horizontal or vertical orientation. Pricing available on contact.
- Sprint Mic DuraPlus — First Rugged PTToC System Stone Mountain's first rugged PTToC system, co-developed with Sprint Nextel, representing the first real alternative to traditional mobile and portable radios and enabling instantaneous global communications over cellular networks.
Quantifiable outcome
- Saved Breckenridge Material Company over $150,000 in one-time hardware costs and $24,000/year in operating costs compared to digital radio system replacement
- +2 more outcomes
Companies that use Stone Mountain
Customer profileNamed customers11 records
Segments4 records
Ideal customer profiles4 records
Stone Mountain technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration23 records
Feature13 records
Stone Mountain partnerships and signals
Strategic signalPartnerships
19 partnerships are on record, tiered core and secondary.
- ZellocoreZello is a leading Push To Talk over Cellular (PTToC) application platform. Stone Mountain products including BluSkye, TruBlu, Elite, Epic, and SpeakEZ are designed to integrate seamlessly with Zello for instant cellular communications.
- SonimcoreSonim manufactures rugged mobile devices. Stone Mountain's Epic speaker microphone is specifically designed to support Sonim handsets with SecureAudio Gen 1 Connector, including XP5s, XP5Plus, XP8, and XP10.
- Motorola SolutionscoreMotorola Solutions is a major LMR radio manufacturer. Stone Mountain's Phoenix LMR speaker microphones are custom developed to support all major Motorola radio platforms.
- T-MobilecoreT-Mobile offers Push To Talk services for business customers. Stone Mountain products integrate with T-Mobile's PTT solutions for cellular-based critical communications.
- SamsungsecondarySamsung provides ruggedized tablets and devices for transportation applications. Stone Mountain products support Samsung devices running PTToC applications.
- ESChatcoreESChat is a Push To Talk over Cellular platform. Stone Mountain speaker microphones support ESChat for Android and iOS devices.
- TASSTAcoreTASSTA is a professional Push To Talk solution. Stone Mountain products support TASSTA applications for critical communications.
- Microsoft TeamssecondaryMicrosoft Teams offers group chat and communication capabilities. Stone Mountain products support Microsoft Teams integration for enterprise communications.
- Instant ConnectsecondaryInstant Connect provides PTT over cellular solutions. Stone Mountain products integrate with Instant Connect platform for communications.
- KodiakcoreKodiak is a PTT over cellular platform. Stone Mountain's Elite and UVox Pro speaker microphones support Kodiak-based applications for enterprise communications.
- HarriscoreHarris Corporation (now L3Harris) is a major LMR radio manufacturer. Stone Mountain's Phoenix LMR supports Harris radio platforms for critical communications.
- KenwoodcoreKenwood is a major LMR radio manufacturer. Stone Mountain's Phoenix LMR speaker microphones support Kenwood radio platforms.
- TCLsecondaryTCL provides ruggedized devices for transportation and industrial applications. Stone Mountain products support TCL devices.
- Clever DevicessecondaryClever Devices provides transportation technology solutions. Stone Mountain products integrate with Clever Devices systems.
- ZebrasecondaryZebra Technologies provides enterprise mobility solutions including ruggedized devices. Stone Mountain products support Zebra devices.
- HoneywellsecondaryHoneywell provides industrial and safety equipment. Stone Mountain products are referenced for industrial communications applications.
- GroupTalksecondaryGroupTalk provides Push To Talk over Cellular solutions. Stone Mountain products support GroupTalk platform.
- StreamWidesecondaryStreamWide provides professional communication solutions. Stone Mountain products integrate with StreamWide systems.
- WeavixsecondaryWeavix provides wearable communication devices for industrial environments. Stone Mountain products support Weavix platform integration.
Scale indicators5 records
Recent moves6 records
Expansion highlights5 records
Stone Mountain competitors and assessment
Company assessmentDirect peers
- Pryme Radio Products: Pryme is a direct competitor making rugged remote speaker microphones, lapel mics, and Bluetooth PTT accessories for LMR radios and PTToC apps. Overlaps head-to-head with Stone Mountain's Phoenix LMR, BluSkye, and TruBlu products across the same truck/fleet and public-safety buyers.
- Klein Electronics: Klein Electronics manufactures rugged remote speaker microphones, surveillance earpieces, and Bluetooth PTT headsets for two-way radios and PTToC platforms. Directly competes with Stone Mountain in LMR/PTToC speaker-mic SKUs serving fleet, security, and public-safety end users.
- Otto Engineering (Otto Communications): Otto Engineering produces rugged remote speaker microphones, surveillance kits, and tactical communications accessories for radios and broadband PTT devices. Competes with Stone Mountain's wired and Bluetooth RSM lines in transportation, law enforcement, and industrial accounts.
- AINA Wireless: AINA makes rugged Bluetooth PTT speaker microphones and dispatch solutions built specifically for PTToC apps (Zello, Kodiak, ESChat). A near-direct competitor to Stone Mountain's BluSkye and TruBlu in the cellular-PTT hardware layer.
- Sonim Technologies: Sonim designs ultra-rugged handsets (XP5s, XP5Plus, XP8, XP10) and publishes the SecureAudio Connector spec that Stone Mountain's Epic microphone is built around. Although primarily a phone OEM, Sonim is both a partner and adjacent competitor as it defines and approves third-party rugged audio accessories for its ecosystem.
- Sena Technologies (Industrial): Sena's industrial/professional Bluetooth intercom and PTT products serve construction, warehousing, and mining use cases that overlap with Stone Mountain's SpeakEZ and BluSkye wireless PTT lines. Compares on Bluetooth audio quality and full-duplex hands-free communications in heavy industry.
Broad incumbents
- Motorola Solutions: Motorola Solutions is the dominant LMR radio OEM (APX, MOTOTRBO series) and ships its own branded RSM/accessory portfolio. It is both a critical partner (Phoenix LMR supports Motorola platforms) and the broad incumbent whose bundled accessories compete against Stone Mountain in public-safety RFPs.
- Hytera Communications: Hytera is a global LMR radio, body-worn camera, and dispatch OEM with its own accessory line serving transportation, public safety, and commercial fleets. Comparable as a broader incumbent in the LMR/PTT communications hardware space that Stone Mountain's Phoenix platform integrates with.
- Tait Communications: Tait is an LMR radio OEM focused on utilities, mining, and public-safety networks with branded accessory portfolios. Direct integration partner for Stone Mountain's Phoenix LMR and an incumbent competitor in mission-critical fleet audio accessories.
- L3Harris Technologies: L3Harris (formerly Harris/Hytera USA) manufactures mission-critical LMR radios (XL, P25 portfolios) for public safety and federal markets. It is a Stone Mountain integration partner via Phoenix LMR but also an incumbent whose proprietary radios and bundled accessories compete at the OEM level.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Stone Mountain social profiles
Digital presenceStone Mountain compliance and trust
Trust signalCompliance10 records
Stone Mountain financial estimates
Financial estimateRevenue estimate
Valuation estimate
Stone Mountain leadership team
Management profileNumber of profiles
Profiles1 record
Stone Mountain funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Stone Mountain M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Stone Mountain
What does Stone Mountain do?
Stone Mountain designs, assembles, and sells ruggedized audio communications accessories — primarily Bluetooth and wired remote speaker microphones, a full duplex wireless transceiver, and a tablet docking station — built to IP68 and MIL-STD 810H standards. The products integrate with Land Mobile Radio systems from Motorola, Harris, Tait, Kenwood, and others, and with Push-To-Talk-over-Cellular platforms such as Zello, Kodiak, ESChat, and TASSTA, serving transportation, first responder, industrial, and commercial customers worldwide.
Is Stone Mountain a public or private company?
Stone Mountain is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Stone Mountain founded?
Stone Mountain was founded in 1999. It employs 11 to 50 people.
Where is Stone Mountain based?
Stone Mountain is headquartered in Huddleston, United States, in the North America region.
How does Stone Mountain make money?
Two revenue lines are on record. Hardware Sales are the primary driver. The others are accessories.
Who are Stone Mountain's main competitors?
Direct peers on record are Pryme Radio Products, Klein Electronics, Otto Engineering (Otto Communications), AINA Wireless, Sonim Technologies and Sena Technologies (Industrial). Broad incumbents are Motorola Solutions, Hytera Communications, Tait Communications and L3Harris Technologies.
Does Stone Mountain have an API?
No public API is recorded for Stone Mountain.
What industry is Stone Mountain in?
Stone Mountain's product category is Ruggedized Audio Communications Hardware. Its primary akta.pro industry code is HDACAFAH, Microphones, Headsets & Audio Input Devices, with a secondary code of HDACALAI, Rugged Smartphones & Push-to-Talk Devices. Its NAICS code is 33429 and its SIC code is 3669.