1、BT Wireless Communication: This BT headset uses a CSR wireless chip, which can achieve full duplex intercom, with a maximum ideal speed of 80km/h‑120km/h, and a maximum distance of 500m (without obstacles). 2、Clear Communication: After the pairing is successful, this helmet headset can realize the free switching of telephone, intercom, and stereo music. Very suitable for clear communication during long distance riding. 3、Noise Reduction And Clear Audio: Advanced DSP noise suppression technology ensure high speed and clear voice quality. Even on a noisy road, maintain a clear conversation. 4、Handsfree: The headset walkie talkie supports answering or rejecting incoming calls; supports redialing the last call; supports automatic answering of incoming calls. 5、BT Music: The helmet headset supports music playback, pause, upper and lower song switching; supports ultra wideband FM radio station search. A relaxing and pleasant riding experience. 6、Convenient And Widely Compatible: This helmet headset walkie talkie is suitable for any full face helmet and most half face helmets. Compatible with smartphones and BT‑S series wireless headsets. 7、Even if you are wearing gloves, the larger buttons are easy to operate. In addition, the earphone and the clamp are connected by a buckle, which is convenient for disassembly and assembly. 8、Good Water Resistance: This motorcycle helmet headset is made of impervious silicone material. Suitable for rainy or snowy days. Suitable for motorcycle helmets, snowmobiles and skiing. Item Type: Helmet Headset Walkie Talkie Model: V9 Pro Material: ABS Colour: Black Bluetooth Name: BT Audio Bluetooth Version: 3.0 Frequency Range: 2.400GHz--2.4835GHz Bluetooth Distance: Approx. 20-30m / 65.6-98.4ft (Different From Mobile Phone) Intercom Distance: Approx. 500m / 1640.4ft Battery Type: Built In 850mAh Lithium Battery (Included) Working Time: 10 Hours Charging Time: About 2.5 Hours Standby Time: 200 Hours Application: Very Suitable For Clear Communication During Long-Distance Riding Instructions 1 x Host 1 x Speaker Kit 1 x Dry Microphone 1 x Hidden Microphone 1 x Microphone Extension Cable 1 x Blowoutproof Cotton 1 x Metal Earphone Clip 2 x Headphone Pad 1 x Hook And Loop 3 x Viscose 1 x Charging Cable 1 x Manual