Stone Mountain Limited (SML) Phoenix Remote Speaker Microphone (RSM) is the only RSM for PTT over cellular with a 10 channel selector and volume controls. It passes MILSTD-810G for vibrations and shocks, and it meets IP-68, making it resistant to microparticles and it may be submerged in 1 meter of water for up to 30 minutes. SML custom designed the Phoenix RSM to reliably connect to Sonim’s SecureAudio Connector on the XP5s and XP8 handsets. This allows the Phoenix RSM connector to screw into the handsets and draw power.

• Push-to-Talk simplex and full-duplex Remote Speaker Microphone
• Two large and tactile PTT buttons
• RampClik™ Volume Control, single button 10 step ramp up/step down
• Meets MIL-STD-810G for resistance to vibration, shock, solar radiation, pressure and temperatures
• Features WhisperTek™ sub-audible Tx audio and OutLoud™ high Rx audio output speaker for enhanced Voice Intelligibility
• Ultra-sensitive, high gain omni-directional microphone for crystal clear transmit audio • 50mm Neodymium speaker for unsurpassed audio clarity
• 100% gold plated PCB’s for unsurpassed performance and reliability
• Built-in 360° rotating belt clip with positive detents every 45°