Feature: 1. Adopt aluminum alloy cover, it is small and light and take no space to storage, USB/memory card play, it support MP3 format, lossless format music APE/FLAC/WMA. 2. Radio and broadcast function, support FM87.5‑108mhz radio, AUX/RCA stereo input, CD/ computer /MP3/ mobile phone connection, match multiple audio source wire ports. 3. Stereo effect is amazing, built‑in V4.2 bluetooth, it is more convenient to match tablet/mobile phone and projector through wireless connection (linear distance of 10m/32.8ft). 4. Digital display directly shows the working mode, playing time, broadcast frequency, etc, special single loop play control, free choice of single or all loop. 5. Equipped with infrared remote control to control product switch, mute, play track, play mode, direct music selection, volume and other functions,with DC cable. Specification: Condition: 100% Brand NewItem Type: AmplifierMaterial: Aluminum AlloyColor: As Picture ShownWeight: Approx. 330.0g/11.6ozRMS Power @ 4Ohm 20W×2CH THD @ 4Ohm <0.25％ Frequency Response: 20Hz ~ 20KHz±1dBInput Sensitivity: LOW LEVEL INPUT 0.25 ~ 2V:Signal Noise Ratio:（+ A）> 85 dBStereo Separation: （+ A）> 80 DbPower Requirement: DC + 12V (9 ~ 15V)Bluetooth: 4.2Battery of Remote Control: CR2025(Ship with Battery). Package List: 1 x Amplifier1 x Manual1 x DC Cable1 x Remote Control