Mini HIFI digital bluetooth audio power amplifier. Aluminum alloy body, , the body is made of aluminum alloy once, the anode treatment, the overall atmospheres, thick, feel is also very good. for SD Card, U disk, AUX input, MP3 format play, support bluetooth wireless connection. Supports FM stereo radio. Low distortion supplies a clearer, stronger and more powerful sound. With Remote control function. The power amplifier can be connected to mobile phones, computers, tablets, , MP3 players, televisions and projectors with AV audio (lotus socket) or 3.5mm headphone output holes, etc. All kinds of mobile phones on the market can be connected by Bluetooth, which can realize wireless playback. Model Number: AK380:(Support Bluetooth /SD Card) Amplifier type: hifi power amplifier Rated voltage: 12V RMS power: 40W+40W Max power: 400W+400W Rated frequency: 20-20KHz Resolution: 47K Distortion rate: 0.1 SNR: 90dB Impedance: 4-16 ohm Power amplifier type: hifi amplifier Interface type: clip Receiving mode; audio input Colour:black Material:aluminum alloy Size:155 x 85 x 45mm Package Contents: 4 Amplifier 4 x Remote Control(random colors, don't accept the specified color) 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.