Features: Experience superiorsly sound with the 2x50W Digital Amplifier Board, features TPA3116D2 auditory type and double channel 3D output for immersive auditory experience. Power supply is 24V, do not exceed this voltages! Full series Protections system with reverse power Protections. Auditory outputs should not be shorted to each other or to ground. Please double checking the wiring is correct before powering up. Speaker output short circuits Protections. Also equipped with vibration resistant designing switching. For Music enthusiasts, professional Auditory engineers and home theater enthusiasts, users in pursuit of high quality sound. Home theater, music studio, professional Auditory equipment upgrades auditory applications. Specifications: Auditory Type: tpa3116D2 Input Voltages: DC5-24V Operating Frequency: 20Hz - 20Hz Output Type: Double Channel; 3D Power: 250W Package Includes: 1PC XH M189 Amplifier Board note: Due to problem of lighting effect, there might be tolerances in product, please understand. Please allow 1cm errors due to measurement.