Description: Support lossless audio playback, built-in high-definition microphone noise reduction, support FLAC, APE, WAV and other lossless audio formats. U disk play, insert and play, Bluetooth MP3 frequency and car radio frequency adjustment. Two mobile phones can be connected at the same time. Real-time monitoring of battery voltage, digital display, clear at a glance. Specification Net weight: 32g Colour: Black Size: 100*65*38mm Material: ABS Rated working voltage: 12V-24V Limit working voltage: 8-27V USB output: dual USB output maximum 5V/3.4A+qc3.0 fast charge Working temperature: 0-60 degrees Signal-to-noise ratio: >60dB Distortion: 60dB Bluetooth version: Version4.2+EDR Bluetooth sound processing: A2DP (Advance Audio Distribution Profile) function Bluetooth transmission distance: less than 5M Effective distance of bluetooth microphone: 0.5-2M FM transmission frequency: 87.5-108.0MHZ Specifications: 1: Car Bluetooth fm transmitter: transfer the music inside the mobile phone and U disk to the car audio player 2: Car charging: You can charge the phone/iPad smartly via the USB interface. 3, Bluetooth car hands-free: the phone can be hands-free calls through Bluetooth one button. 4, car USB: can read U disk through the USB interface (maximum 32GB) Package Included: 1* Car Bluetooth fm transmitter 1* English manual Notes: Due to the difference between different monitors, the pictures may not reflect the actual color of the item. Compare the detail sizes with yours, please allow 1-3cm error, due to manual measurement. Thanks for your understandings