Description: HiFi sound: This power for amplifier module can deliver great sound quality, and features 2.1 channel stereo sound output, which delivers a good music listening experience. Wide compatibility: This power amp board supports bluetooth-compatible, for AUX, U-disk and USB sound card input, and is convenient to connect. Long lifespan: This bluetooth-compatible for amplifier module is designed with static for protection, circuitboard for protection, overcurrent for protection, overheat for protection. Convenient to use: This wireless amp board is designed with several knobs that allow you to adjust its parameter to meet your different needs. APP control: This wireless for amplifier module allows you to use a phone to control it, in this way, it is more convenient and user-friendly. Specification: Input voltage: DC 5-26V/10A and above. Sound channel: 2.1. Bluetooth-compatible version: 5.0. Audio input: Bluetooth-compatible, for AUX, U-disk, USB. Audio output: Left and right channel, subwoofer, 3.5mm. Frequency range: 20Hz-30Khz. S/N rate: 92dB. Power output: 50Wx2(Left and right channels)+100W(Subwoofer). Left right channel suitable speaker: 10-100W, 4Ω-8Ω. Subwoofer suitable speaker: 20-200W, 4Ω-8Ω. Size(LxWxH): Approx. 95x88x25mm/3.74x3.46x0.98 inch. Note: There might be a bit of color distortions due to different computer resolutions. There might be a slight error due to different hand measurements. for Protection board and heat sink need to be installed by oneself. Package Includes: 1 Set Bluetooth-compatible Digital for Amplifier Board.