Features: It is a mini 4.1 channel power amplifier with LCD display. Supports 50Wx4 power output which lets you drive 2 pairs of speakers. You can connect it with your pc/mobile phone/laptop via BT connection, or 3.5mm AUX cable. It also can read U disk, plug and play. The audio amplifier has a harmonic distortion less than or equal to 0.04% this helps you listen crystal clear and sharp music. With treble, bass, microphone, and master volume adjustment buttons for easy operation, you can enjoy the music output as your wish. The remote controller allows you to change audio settings from distance, making you less tired and more comfortable. Specifications: Input: AC 100-240V 50/60Hz, 1.7A; DC 12V 3A-5A Rated Frequency: 20-20KHz Power: 50W*4 Distortion Rate: 80dB Speaker Impedance: 4-8 ohms Material: Aluminum alloy Color: Black Product Size: 17.5*10.5*4.5cm/6.89*4.13*1.77in Product Weight: 469g/16.5oz Package Size: 27.8*21.0*6.7cm/10.94*8.26*2.63in Package Weight: 849g/29.9oz Package List: 1 * Audio Amplifier 1 * Remote Controller 1 * AC Power Adapter 1 * AC Cable 1 * Cable Antenna 1 * User Manual