Specifications: Name: 50Wx2 TPA3116 D2 Dual channel digital power amplifier board Supply Voltage: DC 12-24V Output Power: 50Wx2 Protection: Overvoltage/Undervoltage/Overheated/Reverse/Short Size: Approx. 35 * 27 * 3mm / 1.4 * 1.1 * 0.1in Channels: Two Channel Stereo Quantity: 1 Pc Weight: Approx. 5g / 0.2oz Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 1 Pc x Power Amplifier Board