Description: Technical parameters: Bluetooth version: 5.3 Bluetooth transmission distance: 10m Support Bluetooth hands-free call function Support Bluetooth dual channel Color: Black Frequency: 2.4GHz Operating voltage: 5V Interface: 3.5mm stereo input jack Sleep mode, energy saving Power supply: use mini USB cable to charge Working time: up to 5 hours Interface type: AUX,fiber,RCA,U disk Basic function: Bluetooth reception,U disk playback Support devices: cell phones,tablets,computers,speakers,amplifiers, etc. Specifications: fEATURE: - Upgrade Bluetooth 5.3, equipped with high-performance Bluetooth 5.3 chip, low-loss data transmission response quickly, anti-interference stronger, say goodbye to delay, lag and other problems - AUX / RCA red and white Lotus / digital optical / U disk, to meet the needs of different devices, different audio interfaces - Connect the old speaker or amplifier audio interface, to solve the speaker / amplifier without Bluetooth, can not use the Bluetooth playback problem - Support U disk playback, plug-and-play without driver - Built-in signal gain amplifier, room connection without dead space 10 meters transmission sound quality without delay, signal stability without lag Package Included: 1*Bluetooth-compatible adapter. 1*Charging cable, the 1*AUX audio cable. 1*RCA audio cable. 1*Manual