Technical Parameters: Rated working voltage: 12V-24V Limit working voltage: 9-26V USB output: 5V/2.1A Working temperature: 0-50℃ Play format: MP3 SNR: ＞60dB Degree of distortion: ＜0.1% Frequency response: 20Hz-15Khz Resolution of right and left channel: ＞60dB Bluetooth version: Version 2.1+EDR Bluetooth sound processing: A2DP (Advance Audio distribution Profile) function supported Bluetooth transmission distance: 10M Effective distance of Bluetooth microphone: 0.5-2M FM frequency: 87.5~108Mhz FM mode: Stereo digital PLL frequency locking How to obtain the best transmit effect, volume control recommended as following: 1.you need to find a local blank channel, that means, no radio channels 2.the car radio volume adjust to between 30-35% 3.the mobile phone and machine volume adjust to between 85-95% Principle: FM transmitter cause background noise or other noise, if the radio volume becomes louder, the noise added. About the noise: you need to set your car radio and this product in same FM frequency. Please do not ignore this point. Anyway, each FM products needs to avoid this problem. For more attention: Please read the user manual carefully. Attention: 1.When the U-disk is inserted, line in function Is on and Bluetooth function is turned on, once booted, the product will connect automatically with the phone via Bluetooth with the phone via bluetooth. 2. Never turn the volume to be too loud when FM is working so as to avoid the sound distortion. Please adjust the sound volume through the car audio. 3. A built-in antenna is provided for the product so please avoid using the broadcasting station frequency that is with strong signal so as to get better sound effect.
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