1. This equipment can detect the battery voltage. 2. Supports Bluetooth hands-free calling, built-in microphone, and secure answering calls. 3. Compatible with mobile's A2DP function. The music will be played directly while the mobile phone is connected. 4. The mobile phone can be connected automatically when the device is turned on. 5. Support external USB flash drive, can play MP3 / WMA format music files. 6. Built-in 5V / 2.4A output car charger, available for charging portable devices in the car.
