Bluetooth FM Transmitter Modulator Car Kits MP3 SD USB Bluetooth handsfree call Stereo Bluetooth (A2DP function) and FM transmitter Echo cancellation and noise removal Bluetooth version: 2.0 Support USB / SD Card Play format: MP3 SNR: more than 60dB Distortion factor: less than 0.1% Frequency response: 20Hz - 15Khz Auto power-off memory Rated voltage: 12V Limit voltage: 9-26V Power consumption: 1W Work temperature: -20°C - 50°C Bluetooth transmission distance: 10m - 15m Compatible with all Bluetooth Phones in Public bookmarkswith bluetoothcarfmkitsmodulatormp3transmitterusb