Product FeaturesExcellent sound quality with D.S.P solution for echo cancellationNoise suppression (CVC)Support USB disc and SD cardApply to USB devices and MP3 playerSupport MP3/WMA music format Transmitter powered by 12V car socket and remote powered by 1 - CR2025 battery (1x CR2025 battery NOT included)Give a variety of smart phone chargingTransmit the audio wireless to the radioSwivel axis design， easy to useColor: BlackParameters Model:301EFrequency Response:20Hz-15KhzTransmission Frequency: 87.5-108MHzSupported Format:MP3， WMA Rated Operating Voltage:12 VUltimate Operating Voltage:9-26 VSNR Ratio > 60dBLeft/ Right Channel Separation > 60dBMic range:0-2mAudio distortion degree: 0.1%Power Consumption: 1WWork Temperature:-20-50 degreeBluetooth Version: 3.0Bluetooth Transmission Distance: 10-15mDimensions: Approx 11 x 4 x 3 cmWeight: 86gPackage includes:1 x Hands free Car Kit FM Transmitter1 x remote controller