1. quality: high quality material, safe and durable.2. Stable performance: with better noise performance, output drive capability and relatively high small signal bandwidth, power supply voltage range.3. High fidelity: When used as an audio amplifier, the tone is warm and the fidelity is high.4. Wide range of uses: suitable for high quality and professional audio equipment, instruments, control circuits and telephone channel amplifiers.5. It has the characteristics of small size, high efficiency, high power and small heat.Product name: 50Wx2 two-channel digital power amplifier boardProduct Model: XY-502Supply voltage: DC4.5~27VOutput power: 50W*2Protection function: reverse connection, overvoltage, undervoltage, overheating and short circuitSignal to Noise : 102dBNumber of channels: two-channel stereoType: Audio Power Amplifier Board ModuleType: Power Amplifier BoardType: Audio Power AmplifierType: Digital Power Amplifier Boardcolor:Blue+blackMaterial:PCBsize:63 x 51 x 22mmPackage Contents:1 x Amplifier BoardOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.