Features: 1. Mini amplifier for speakers with all aluminium alloy shell, to eliminate all kinds of electromagnetic interference 2. Speaker amplifier has high power audio amplifier chip, 20W x 2 RMS power output, low distortion 3. Mini stereo amplifier adopts 3.5mm audio input, supports all kinds of audio input, such as mobile phones, DVD players, computers, MP3/MP4, etc 4. Amplifier home audio is great for use on your vehicle or your home, smart, lightweight aluminum casing 5. Home stereo receiver have two pairs of speaker output clips, easy to wire 6. Stereo amplifier home audio allows for full control of volume, treble and bass output nbsp; Specifications: Input impedance: 47Kohm Speaker impedance: 4 8 ohms Compatibility: Compatible with mobile phone, MP3, computer Volume control: Support Connection: Wired Interface: 3.5mm audio jack, input port Audio Source: Electronic devices with 3.5mm plug Material: Aluminum alloy Frequency: 20Hz 20KHz Distortion: lt;0.4% S / N: gt;80dB Frequency response: 20Hz ~ 20KHz Distortion: lt;0.1 (1KHz) Output power: RMS 20W x 2CH Input: DC 12 14.4V nbsp;≥2A Size: Approx. 15.4 * 9.5 * 3.9cm / 6.1 * 3.7 * 1.5inch Color: Silver Package weight: approx. 310g nbsp; Package List: 1 x Power Amplifier 1 x User Manual