Features 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 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 * 88 * 32mm / 4.9 * 3.5 * 1.3in Package size: 160 * 115 * 47mm / 6.3 * 4.5 * 1.9in Package weight: 290g / 10.2ounce Package List Packing List: 1 * Amplifier Board