Stone Mountain Epic RSM

Stone Mountain – Rugged remote speaker mic for Sonim XP8 and XP5s

Product Quantity
Stone Mountain Tac10™ Option
$105.00 excl. GST
Tac10™ Type

Bundle Total: $0.00excl. GST

SKU: PEPX301X Category: Tag:


Stone Mountain Epic RSM

The Stone Mountain Epic RSM series is for Sonim XP8, XP5 & XP10 and Kenwood KWSA50K & KWSA80K.

The Epic Series from Stone Mountain is the world’s only waterproof, Mil-Spec compliant Speaker Mic for Mission Critical Push-to-Talk over Cellular (MCPTT) applications. Specifically designed for LTE Smartphones, such as the Sonim XP8 & XP5s and Kenwood KWSA50K & KWSA80K, the Epic is complimented by a complete line of audio accessories and charging options – See Epic Accessories. Designed, Assembled, Tested, and Supported with Pride in the USA, the Epic provides a rugged, feature-rich platform for your most demanding applications.

Designed, Assembled, Tested, and Supported with Pride in the USA, the Epic provides a rugged, feature-rich platform for your most demanding applications.


  • Waterproof to IP68 – 1 meter for 31 minutes.
  • Meets/exceeds military environmental specs (Mil 810G).
  • Large, super tactile side PTT.
  • 14 level one-touch RampClickTM.
  • SureSealTM 3.5mm Rx audio jack.
  • OutLoudTM Neodymium magnet 50mm speaker.
  • Gold plated Printed Circuit Board for 100% reliability.
  • Secure 360° rotating belt clip w/ 45° positive detents.
  • Ergonomic, plastic/rubber two shot molded case.
  • Optional Tac10TM ten position channel select knob.
  • Optional IS rated models available: Class 1, Div 2 Groups A, B, C, D, T4.


Devices: Sonim XP8, XP5 & XP10, Kenwood KWSA50K & KWSA80K

PTT: Compatible with many popular PTT application platforms, IWPTT, ESChat, PTTExpress, Sprint Direct, Zello etc.


Microphone Element Omni directional
Microphone Sensitivity -40dBV (0dB=1V/Pa)
Speaker Output Power 1W
Speaker Output Level Up to 116+ dB (device dependent)
Accessory Interace 3.5mm sealed Rx audio jack
Dimensions 79mm x 65mm x 29mm
Weight 195 gm
PTT High tactile
Emergency Dedicated red button – PTT app dependent
Volume Control RampClik one touch, 10 level, ~2.5 dB/level
PTT APP Supports all major PTT apps
Hands Free Operation – Coming soon Supports remote Rx, Tx & PTT – See TruDock and HanzFree accessories
Noise Reduction Optional ProClear DSP noise reduction system
Rotating Belt Clip 360° w/ positive detents every 45° / Replaceable / Optional button clip
Device Connector Gold plated contacts, two shot molded housing
Mining/Industrial Rx Audio Protection Optional MagShield acoustic speaker shroud
Channel Select Optional Tac10 high tactile channel select knob
Hazardous Location Rating Optional Certified Non-Incendive Class I, Division 2, Groups A, B, C & D, T4, -30° C  ≤ Ta ≤ +60° C.
Immersion Rating Designed to meet IP68
Mil-Std 810 H Designed to meet:
Low Pressure 500.6/1 Yes
High Temp 501.7/I & II Yes
Low Temp 502.7/I & II Yes
Temp Shock 503.7/I Yes
Solar Radiation 505.7/II Yes
Blowing Rain 506.6/I Yes
Humidity 507.6/II Yes
Salt Fog 509.7/I Yes
Sand & Dust 510.7/I Yes
Immersion 512.6/I Yes
Vibration 514.8/I/CAT 1 Yes
Shock 516.8/I & IV Yes
Warranty 24 month


The Stone Mountain Epic RSM is a great companion for PTT devices using Impulse Wireless PTT Services 

Additional information


Stone Mountain