Perman Car Bluetooth Stereo Aux Input USB/SD/FM MP3 Receiver Player In-Dash 8268 Bluetooth function: can easily auto connect with the car radio directly. USB mode: support 16GB MAX,can use as charging port. SD mode: support SD capacity MAX 16GB. AUX input function. More music source choices,for ipod/iphone/ipad. Hands free bluetooth,built in MIC. Hands free calls. Support advanced audio distribution profile. Off time display function. Digital high quality FM stereo radio. Preset 18 station(frequency:87.5-108MHz). Support USB/SD/MMC card reader. Support audio:MP3/WMA/WAV. Support remote control. Rotary volume control. MP3 randomized,10 track up/down playback.