This product is a dual channels audio amplifier, which is made of durable aluminum alloy material, with good texture, safe and practical. Easy to install and use, it can be easily applied to your audio devices. It is a very practical accessory that will meet your needs well. Features -Color: Black -Material: aluminum alloy -Size: 13.00X11.00X4.70cm/5.11X4.32X1.85in Input voltage: DC 12V Current requirements: more than 2A Output power: 20W Frequency response: 20Hz-20kHz SNR: 80dB Output impedance: 4-8ohm Distortion: <4% Input: AUX/ - With stereo surround effect, just like sitting in the music hall. - Clear audio quality output, volume, treble and bass adjustable, you can enjoy music wherever you go. - Static noise process technique, no current sound, no lagging during music playback. - Great sound quality transmission, can be used in stereo, CD player, TV, computer, and etc. - Simple in structure, easy to use, not easy to deform, you can use it with confidence. Package list: 1 amplifier