Creazy LCD Car Kit MP3 Bluetooth Player Audio FM Transmitter FM Modulator Radio SD MMC Free Bluetooth Steering Wheel control Flexible metal hose, suitable for all vehicles As soon as the auto starts, screen displays its battery voltage. Play music from USB disk and TF Card, TF Card reader Audio/music playback via Bluetooth A2DP Support Bluetooth HFP/HSP,A2DP/AVRCP Profiles Voice prompts the caller number when a call comes in. Frequency ranges: 88.1 ~ 107.9MHz Bluetooth Handsfree function: Full Duplex, DSP(Digital Signal Processing) Technology, CVC technology for echo cancellation and noise suppression Charge for iPhone/iPad/Samsung/Htc/Google