Features: 1.Wireless helmet bluetooth speaker, support 10m/32.8ft wireless connection range, easy to install. 2.Built?in microphones and loudspeaker, support hands-free calls and automatic answer function. 3.Support the bluetooth music playing, can play wireless music when connected with BT device. 4.IP54 dustproof and waterproof, can improve the driving entertainment and security. 5.Can stand by for a long time(normally a week) after full charging, low power, can provides clear sound. Specification: Item Type: Helmet Headset Speaker_x000D_ Material: Metal + Rubber_x000D_ Battery Model: Polymer Lithium Battery(Built-In)_x000D_ Number of Batteries: 1_x000D_ Battery Capacity: 150mAh_x000D_ _x000D_ _x000D_ 1. Support the bluetooth music playing_x000D_ 2. Hands-free calls,automatic answer_x000D_ 3. Status indicators and prompt_x000D_ 4. Built-in microphones,loudspeaker and polymer lithium battery_x000D_ 5. Improve the driving entertainment and security_x000D_ 6. A full charge ,normal for a week , long standby_x000D_ 7. Dustproof,waterproof , IP54_x000D_ 8. Audio power : 3W_x000D_ _x000D_ _x000D_ Installation: Tear off the adhesive tape, stick the speaker to a suitable place, wireless bluetooth connection, just connect and play._x000D_ How to Use:_x000D_ Turn on the audio switch, then turn on the Bluetooth function in the phone, select the device with the BT name and click Connect, you can use it, connect within 10m/32.8ft (USB socket charging) Note: Please use within 10m/32.8ft.