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/ 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. Item Type: Amplifier Weight: . 330.0g/11.6oz RMS Power @ 4Ohm 20Wx2CH @ 4Ohm Frequency Response: 20Hz ~ 20KHz1dB Input Sensitivity: LOW LEVEL INPUT 0.25 ~ 2V Signal Noise Ratio:(+ A) 85 dB Stereo Separation: (+ A) 80 Db Power Requirement: DC + 12V (9 ~ 15V) Bluetooth: 5.0 Material: Aluminum Alloy Color: As Shown Package Contents: 1 x Amplifier 1 x DC Cable 1 x Remote Control Only 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.