Feature: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 SpeakerMaterial: Metal + RubberBattery Model: Polymer Lithium Battery(Built-In)Number of Batteries: 1Battery Capacity: 150mAh1. Support the bluetooth music playing2. Hands-free calls,automatic answer3. Status indicators and prompt4. Built-in microphones,loudspeaker and polymer lithium battery5. Improve the driving entertainment and security6. A full charge ,normal for a week , long standby7. Dustproof,waterproof , IP548. Audio power : 3WInstallation: Tear off the adhesive tape, stick the speaker to a suitable place, wireless bluetooth connection, just connect and play.How to Use: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).Package List:1 x Bluetooth Audio1 x Hook and Loop FastenersNote:Please use within 10m/32.8ft.