Features:TDA7297 power amplifier board A board, dual channel 15W+15W, can be connected to 4-8 ohm10-50W speaker, small body and loud voice, wide application range.No current surge sound at startup, high fidelity without static noise!The sound quality is super good--the high-pitched sound is soft and has no obvious harshness; the bass is strong, full powerful.Easily connect mobile devices, computers, MP3, for IPAD and other terminal devices.There are wiring terminals that can be screwed on the circuit board, which can be quickly connected without using a soldering iron.Specification:Dual 15W+15W, Can be connected to 4-8 ohm 10-50W speakers3.5mm audio inputDC power supply: 9-15VSize: Approx. 7.2 * 4.9 * 4.1 cm/ 2.83 * 1.93 * 1.61 inWeight: Approx. 55 g / 1.94 ozPackage list:1 * Power Amplifier Board