Usage Tips:Aluminum metal shell: Comfortable texture, mini . Decorate casually without occupying spaceUSB/T memory card playback: (supports MP3 format, lossless music APE FLAC,WMA); Radio function: FM87.5-108Mhz electronic frequency modulationAUX/ stereo input: CD/computer/MP3/phone connection. Matching multiple audio cable ports2.0 channel output: more stunning stereo live effects; Built in V5.0 version Bluetooth: Matching tablets/phones with projectors via wireless connection is more convenient (straight distance of 10 meters)Digital display screen: intuitive display of working mode, playback time, broadcast frequency, etc; Special single loop playback control: freely select a single, loop all tracks;Equipped with infrared remote control: Control product switch, mute, play tracks, play mode, as well as direct song selection, volume size and other functionsNotice:If it is used in a car (12V voltage), please use the car lighter power supply. Connecting to the car battery will cause noise.If it is used in a truck (24V voltage), you need to use a step-down device to reduce the voltage to 12V before it can be used. Otherwise, the power amplifier will be burned out.If it is for household use, please use a 12V 2A-5A power adapter.Channel: 2CHRMS Power: 20W x 2Max Power: 200W x 2Input power Voltage:DC12-18V 3A2.0Channel sound outputSpeaker impedance:4-8Frequency response:20-20KHzMinimum :Less than 0.4%: 85dBIinput Sensitivity:270mVIntput Impedance:47KohmUSB/MMC play functionElectronic volume control/AUX inputFM frequency Rang 87.5-108MhzInfrared Remoter controlInternal High-puality Bluttooth V5.0Colour:Silver BlackMaterial:Aluminum AlloyPackage Contents:1 x Digital Audio Power Amplifier1 x Remote Control1 x CableOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.