Feature:1. [Easy To Use] 4 people talk to each other at the same time, no need to press any key, automatic real time call, free your hands, make your driving safer.2. [Automatic Answering] This helmet headset can answer the phone automatically, when there is a call from the walkie talkie, it will automatically answer.3. [FM Radio] Support domestic radio function, 88Hz to 108Hz frequency, can also wirelessly listen to mobile phone MP3 music, the sound quality is clear.4. [BT Pairing] BT 3.0 chip, after the first pairing, it will automatically connect to the intercom another time it is turned on, which is very convenient.5. [Compatible] This wireless motorcycle intercom headset is compatible with GPS, MP3, tablet and other devices, and can use music, GPS voice navigation function.Specification:Item Type: Helmet HeadsetMaterial: ABSBT Protocol: V3.0 + EDRIntercom Distance: Up to 1000m/3280.8ftBT Connection Distance: Approx. 10m/32.8ftWaterproof Grade: IP65Standby Time: 450hCharging Time: 2.5hBuilt in Polymer Lithium Battery: 850mAh.Package List:1 x Host1 x Helmet Headset1 x Manual1 x USB Cable1 x Screw Clip1 x Hook and Loop Clip4 x Hook and Loop2 x Screw1 x Wrench