Features: Bluetooth-compatible receiver is suitable to turn home, sound device, speaker into handsfrees, wireless devices. Builts in microphone, supports wireless connection, highly-definition sound quality transmission, convenient for answering call. Small size,easily install, suitable for various car models Suitable for driver, music enthusiasts, and business people who need to make frequent phone call. Stable connection and fast transmission. Specifications: Material:ABS+Metal Option Type:BT870,BT860,BT850; Cable Length:Approx.50cm/19.68in Input:3.5mm AUX Power:5v USB Package Includes: 1xWireless Receiver note: Please allow 1-2cm errors due to manual measurement,please make sure that you donot mind befores you order. Due to the differences between different monitors, the picture may not reflect the actual item color.