Colour Name:Blue Features: LED Display the FM frequency/track Excellent 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 Support 12-24V voltage from the car cigarette lighter Specification: Size: 8.0 x 7.0 x 3.2cm Package weight: 2.1 oz/61g The audio cable length: 70cm Frequency range: 87.5-108.0Mhz Output Frequency: 20Hz-15KHz Supply voltage: 12-24V Rated current: 90mA Power consumption: 1W Work temperature: 0-50 degrees Support file format: MP3/WMA USB Charge output: 5V/2.1A Music format: MP3 format USB Maximum support: 32G Micro SD Maximum support: 32G Bluetooth version 2.1 + EDR Transmit distance: 10m What is included: 1 x Bluetooth MP3 Player FM Transmitter Hands-free Car Kit 1 x Audio cable 1 x User Manual