With compact portable design Bluetooth hands-free function LED Display the FM frequency/track、Support multipoint connections: can connect two phones at the same timeBuilt-in FM transmitter、 full frequency: 87.5-108.0 MHzBluetooth hands-free kit、 with built-in microphoneExcellent voice quality、 use the DSP (digital signal process) technology to echo cancellation Switch to hands-free mode automatically from music playing status when receives an incoming call Double USB charging ports for charging iPod/iPhone、 Samsung、 iPad、 Nokia and other mobile devicesSpecification: Support file format: MP3/WMA Dual USB output、 Maximum output 5V/2.1A USB Maximum support: 32G FM Frequency range: 87.5-108.0Mhz Bluetooth version 2.1 + EDR Transmit distance: 10m SNR: R60dB Supports Bluetooth Handsfree Support Bluetooth stereo music play Echo cancellation and noise suppression (CVC) technology LED Screen Display Automatic power-off memory function To Switch On/Off BT on this device: Press ~ over 3 seconds How to connect the Car audio? Ensure switch to FM mode 、 comply the same transmit frequency with car audio frequency、connect the bluetooth devices、 play what you like.Package Contents:1 x Bluetooth MP3 Player FM Transmitter Hands-free Car Kit Charger、 1 x User Manual