Feature: 1. Low loss metal film capacitor, dedicated inductor for digital power amplifiers. 2. Gold plated socket with fine conductivity and high reliability. 3. UltraLow noise, PureSound quality. 4. Left and right channel GainAdjustment function. 5. Can be connected to an external BT antenna. 6. Protections against overvoltage, short circuit, overheating, undervoltage, etc. Specification: This power amplifier is compact, easy to carry, and simple to use, dual channel stereo sound, without compromising sound quality. Features: Low loss metal film capacitor, dedicated inductor for digital power amplifiers. Gold plated socket with fine conductivity and high reliability. UltraLow noise, PureSound quality. Left and right channel GainAdjustment function. Can be connected to an external BT antenna. Protections against overvoltage, short circuit, overheating, undervoltage, etc. Specifications: Type: type A, type B (optional) Color: black Main material: metal+plastics Power: DC12-36V/8A BT: 5.2 Audio input: BT+AUX+U disk+USB Sound Card Frequency range: 20Hz-20KHz BT audio decoding: AAC/SBC U disk decoding: WAV/FLAC/APE/MP3 Output power: 2*10W@8Ω/12VDC, 2*20W@4Ω/12VDC, 2*35W@8Ω/24VDC, 2*70W@4Ω/24VDC, 2*80W@8Ω/36VDC, 2*160W@4Ω/36VDC, 2*220W@3Ω/36VDC Item size: 125 * 88mm / 4.9 * 3.5in Package size: 160 * 115 * 47mm / 6.3 * 4.5 * 1.9in Package weight: Type A: 305g / 10.8ounce Type B: 350g / 12.3ounce Packing List: 1 * Amplifier Board Package List: 1 * Amplifier Board