1.100% brand new and high quality.  
2. Built-in Bluetooth 4.2 Microphone, supporting hands-free calls. Safer and more convenient.  
3.Dual USB outputs 5V/3.4A, suitable for charging iPhone, iPad, iPod and other devices.  
4.Noise cancellation function, built-in noise cancellation circuit, make the call sound clearer  
5.LED display the number.   6.Battery Voltage,Automatically detect car battery voltage, voice reminder, support instant voltage viewing.