Stereo Amplifier Board Speaker Audio Amplifier USB U-Disk Input Amplification Module for Speakers Computer Compared with traditional AB class amplifiers, it consumes less electricity and generates less heat at the same power output. ensuring that the amplified audio signal can faithfully restore the original sound quality, suitable for HiFi audio applications. including short circuit protection, overheating protection, undervoltage and overvoltage protection, etc., enhancing system stability and reliability. Color: Black Material: Aluminum Alloy Package Contents: 1*Stereo Amplifier Board Speaker Only the above package content, other products are not included. Note: Light reflection 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.