Kabi 2016 Mini Wireless Car Kit MP3 Player Wireless Bluetooth FM Transmitter Radio Adapter Car Charger with USB TF Card Reader and Calling Remote Control It supports Bluetooth hands-free phone calling for its build-in microphone. When you have a call through it, noise and wind can be suppresses to create full duplex sound quality by CVC technology. Supported frequency is from 87.5 - 108.0 MHz. Supports USB, TF card, support MP3/WMA/WAV music to format. Supports A2DP function of mobile phone via Bluetooth directly high-quailty mobile phone music(Bluetooth stereo). The power supply after opening, automatic back to even, automatic into the matching condition. Integrated car charger of output 5V - 1000mA, is available for charging handgeld devices in car.