Features: brand new and high quality Automatic checking of battery voltage after being powered on. Support Bluetooth-compatible hands-free communication, built-in microphone, convenient and safe answering calls; caller ID display. Noise processing CVC, wind noise suppression, full-duplex communication technology during a call. Support mobile phone A2DP function, for play high-quality mobile music directly after connecting to Bluetooth-compatibletooth. After the power is turned on, it will automatically connect back and enter the pairing state automatically. Specifications: Material: ABS Size: 8.7x4.7x19 for cm/3.42x1.85x7.48 inches Approx. TYPE-C Output Voltage/Current: 5V/3A 9V/2.1A 12V/1.5A TYPE-C/No-Load Voltage of Fast Charging Port: 5V/9V/12V TYPE-C Overcurrent Protection: 3-3.3A Gross Weight/Net Weight: 123g/88g IC for Protection Limit Value of Power Supply: 130C/266F Note: 1.Please allow slight inaccuracy due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Set of Car Mounted Bluetooth-compatible Device