Features: 1. Compact size and lightweight, sturdy aluminum alloy enclosure. 2. Low distortion, acoustically accurate reproduction of music. Ideal for both home and car audio applications. 3. Built-in loudspeaker protection: When the amplifier is turned on to protect speakers from high volume bursts of audio. 4. Compatible with car, motorcycle, MP3, computer speaker and other audio applications. 5. It has the character of low noise, light weight, large power output and good sound quality. 6. With infrared remote control function. 7. High fidelity four sound output. Specification: Input voltage: 13.5V Input current: 5A Output power: 45Wx4RMS Signal to noise ratio: 80dB Frequency response: 20HZ-20KHz Distortion rate: <0.1% Impedance: 4-8Ω Package List: 1 * Amplifier 1 * Instruction Manual 1 * Remote Control 1 * Power Adapter 1 * Charging Cable 1 * Audio Cable 1、Compact size and lightweight, sturdy aluminum alloy enclosure. 2、Low distortion, acoustically accurate reproduction of music. Ideal for both home and car audio applications. 3、Built-in loudspeaker protection: When the amplifier is turned on to protect speakers from high volume bursts of audio. 4、Compatible with car, motorcycle, MP3, computer speaker and other audio applications. 5、It has the character of low noise, light weight, large power output and good sound quality.