Features 1、Compact size audio power amplifier. Two main channel output. 2、Left and right channel outputs are interfaces for speakers. 3、Low distortion supplies a clear, strong and more powerful sound. Specification This audio amplifiers is small in size and easy to operate, you can use the audio amplifier at home, and carrying the audio amplifier to your car is also very convenient. Features: AK170: Compact size audio power amplifier. Two main channel output. Left and right channel outputs are interfaces for speakers. Low distortion supplies a clear, strong and more powerful sound. Made up of aluminum alloy body, thick, light weight and practical. Large knobs are designed with blue LED lights tomake the products more beautiful. AK370: It is a compact size power amplifier for 2.0CH speakers. With LCD display, backlight design. Supports FM radio function. With remote controller, full-featured remote control is supported. Can read U-disk and memory card, plug and play, Supports BT wireless connection. Treble, bass and v-olume adjustment buttons for easy operation. Left and right channel output, rated power 20W + 20W. Specifications: Type: AK170, AK370 (optional) AK170: Color: black Material: aluminum alloy Power: 20W * 2 Load impedance: 4-16Ω SNR: 90db Frequency: 20Hz-20KHz Distortion rate: 0.01% Item size: 125 * 75 * 40mm / 4.9 * 3.0 * 1.6in Item weight: 150g / 5.3ounce AK370: Color: black Material: aluminum alloy Power: 20W * 2 Load impedance: 4-16Ω SNR: 90db Frequency: 20Hz-20KHz Distortion rate: 0.01% Remote battery: CR2025, 3V, 150mAh Item size: 125 * 75 * 40mm / 4.9 * 3.0 * 1.6in Item weight: 250g / 8.8ounce Package size: 133 * 113 * 50mm / 5.2 * 4.4 * 2.0in Package weight: 300g / 10.6ounce Note: Package without battery and plug(for power amplifier), you need to prepare your own power-supply. Packing List: 1 * Power Amplifier 1 * User Manual Package List 1 * Power Amplifier 1 * User Manual