TDA7297 power amplifier board, with binding posts, 2.0 dual-channel 15W+15W, can be connected to 4-8 ohm 10-50W speakers, small size, large volume, and a wide range of applications. Voltage: DC 9-15V, recommended DC voltage 12V, current above 2A Power: 15W+15W Output impedance: 4-8 ohms The advantages of this board: no current impact sound when booting, high fidelity without static noise! The sound quality is super good - the treble is delicate, soft, transparent, without obvious harshness; the bass is strong, full, powerful, and freely retractable. Recently, a small number of customers reported that the board is a little noisy, mostly because the power supply problem has not been solved. After testing, there is no noise at all when using a battery above 12V2A or a transformer above 12V30W. If it is powered by a switching power supply or other variable power supply, low noise may occur due to poor linearity. Colour: as shown Material: plastic Package Contents: 1 x Audio Amplifier Board Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Parts For DIY Kit Dual-Channel Parts 15W+15W Digital Amplifier