Feature: 1. Dual Connection: The hands free speaker supports two mobile phones to connect and jointly control the speaker playback at the same time. 2. Handsfree: Support bluetooth mobile phone navigation reminder broadcast, music playback, etc., quick link, easy to opereate, free your hands. 3. Practical: One click answering and number broadcast to incoming calls, no need to hand held the telephone, double click to replay, to ensure driving safety. 4. Vibration Sensor: Vibration occurs when the door is opened, and the car Bluetooth will automatically turn on and connect with the mobile phone. 5. Powe Saving: The bluetooth wireless transmission range up to 10 meters, after getting off the car beyond the range within 5 minutes will automatically shut down, greatly saving power. Specification: Item Type: Car Bluetooth SpeakerMaterial: ABS Bluetooth: 5.0 Bluetooth Protocol: HFP, HSP, A2DP Wireless Range: 0-10 meters Battery Type: Built in 550mAh lithiumion battery Call Duration Time: About 10 hours Standby Time: About 500 hours . Package List: 1 x Speaker1 x Back Clip1 x Power Adapter1 x Data Cable1 x Manual