Description: 100% brand new, high quality and long service life. Using TPA3110 power amplifier chip, do not need heat sink, at the same time also has overcurrent, overheating maintenance function, very powerful. This product is improved by using the power amplifier standard circuit, and the bass thrust is stronger. This product does not have any disturbing noise and does not require special handling. Easy to install,convenient disassembly. Item 100% like the picture shown. Specification: Material: Plastic Size: 32 x 25 mm / 1.26 x 0.98 inch Output Power: 15W x 2 Working Voltage: DC 8-18V Working Current: Max:3A Static state: 8mA Efficiency: ≥90% SNR：100dB Frequency Range：20Hz-20KHz Speaker: 4-8Ω Net Weight: about 4g Package Includes: 1 Piece TPA3110 Digital Amplifier Board Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor.