Helmet Bluetooth headset: The headset is fixed to the inside of the helmet with Nylon Sticker, and uses microphone ENC noise reduction technology, which makes calls clearer during cycling, as if two people are chatting face to face. Bluetooth 5.3: Adopts the newly upgraded 5.3 high-version Bluetooth chip, which has higher compatibility and faster and more stable data transmission. Lower power consumption and stronger battery life: 15 hours of continuous use at a time. High-definition sound quality decoding: 10mm composite diaphragm speaker takes into account both high and low , and pays attention to the detailed sound experience. -to-two: You can connect two Bluetooth devices at the same time, switch calls at any time, and have fun with entertainment. Wide compatibility: Strong compatibility, suitable for half helmets, full helmets, and flip-up helmets. Color:Black Material:plastic Package Contents: 1 * Motorcycle Helmet Headset 1 * USB Cable 1 * English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.