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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