Features 1、Designed with dual TPA3221 amplifier chips, high efficiency, low powerconsumption, fine sound quality, and comprehensive protections. 2、The IPEX interface has been soldered and can be connected to an external BT antenna. 3、Quick and smooth BT 5.2 connection. 4、You can customize sound effects through your mobilephone. 5、Made of fine quality material for long lifespan. Specification Type: without case, with case, with line (optional) Main color: black PowerSupply: DC12-30Volt/5A above BT: 5.2 Audio input: BT+AUX+U Disk+USB Sound Card BT audio decoding: AAC/SBC U disk decoding: WAV/FLAC/APE/MP3 Left and right channel output power: 10W+10W@8Ω/12VDC 20W+20W@4Ω/12VDC 35W+35W@8Ω/24VDC 70W+70W@4Ω/24VDC 60W+60W@8Ω/30VDC 100W+100W@4Ω/30VDC Subwoofer output power: 10W @8Ω/12VDC 20W @4Ω/12VDC 35W @8Ω/24VDC 70W @4Ω/24VDC 60W @8Ω/30VDC 100W @4Ω/30VDC 200W @2Ω/30VDC Without case size: 111 * 100 * 23mm / 4.4 * 3.9 * 0.9in With case size: 112 * 102 * 28mm / 4.4 * 4.0 * 1.1in Package size: 150 * 132 * 53mm / 5.9 * 5.2 * 2.1in Package weight: without case: 255g / 9.0ounce with case: 345g / 12.2ounce with line: 295g / 10.4ounce Package List without case: 1 * Power Amplifier Board with case: 1 * Power Amplifier Board 1 * Case (Self assembly required) with line: 1 * Power Amplifier Board with 200mm Line