Bluetooth 5.0 technology, faster transmission speed, longer effective distance, lower power consumption, high performance Automatic connection after reboot, playback from the last disconnect song or frequency 12V-24V voltage, apply to most vehicles Dual USB ports, can meet the charging requirements of multiple electronic devices at the same time, the maximum output current is 3.1A Bluetooth answer, hang up, reject, redial and other functions Support Bluetooth stereo music playback LED display Support car battery voltage detection Support U disk playback (1G-32G) Support TF card music playback (1G-32G) Support MP3/WMA/WAV format music Support FM full frequency point transmission function, 87.5-108.0MHZ Automatic power-off memory function U disk port supports 5V/1A mobile phone charging Support 5V/3.1A mobile phone charging Support mobile phone navigation voice prompt Support charging recognition Specification: Rated working voltage: 12V~24V Limit working voltage: 8-32V USB 1 output: 5V/1A, USB 2 output: 5V/3.1A Support music format: MP3/WMA/WAV Support U disk capacity: 1G-32G Support TF card capacity: 1G-32G Working temperature: Battery voltage accuracy: error 1V Signal to noise ratio: >60dB Distortion: Frequency response: 20Hz-20Khz Left and right channel separation:> 60dB Bluetooth version: 5.0 Bluetooth sound processing: with A2DP (Advance Audio Distribution Profile) function Bluetooth transmission distance: 10M Bluetooth microphone effective distance: 0.5-2M Size: 7.7*5.2*3.5cm