Sensear SmartPlugG Series SMPLUG03PRODUCT FEATURES Connects to all industry leading two way radios via wired connection or Bluetooth for conversation and audio streaming on FULL featured model. Up to 31dB NRR and in ear voice pick up mic (no Boom mic.). 20 hour battery life and 5 Hour charge time with internal battery. SENS Technology: 360 situational awareness, face to face communication, 82dB in ear volume limiter. Two Way Radio CABLE REQUIRED on standard model with no Bluetooth.