Qualcomm Bluetooth Chip 5.1 Version Intelligent DSP Sound System, CVC 12th Generation Noisy Reduction Processing, 16K Voice Transmmission 3D Stereo 4 Riders Up To 2KM Can pair with any brand intercom Can pair with anyone of 4 riders targeted One Step Button Paring For 4 Riders (2KM Distance) Flash Paring Within A Second Music Sharing Multi Languages (English, Spanish, French, Germany, Italian, Chinese, Japanese, Korean, ) Phone, MP3, GPS Voice Bluetooth Line Transfer Voice Wake Up Multi Devices Connected While Supporting The Connection Of Two Phones Support Up To 120KM/H Speed 40MM Speaker Membranes, Allow You To Enjoy Great Sound Quality Support Online Upgrading Software IP67 Waterproof 30 Hours Talk Time /33 Hours Listen To Music/500 Hours Standby Time Charging Time 2 Hours Battery Power 900Mah Color:As Shown Material:ABS Package Contents: 1 set * Motorcycle Helmet Intercom(Without FM Radio)