The main circuit of the electrolytic capacitor signal adopts a chip electrolytic capacitor with a capacity of 4x470UF, which ensures a strong and continuous support.The resistors high- chip resistors to a good signal-to-noise of the whole machine.The TPA3116 PCB is made of 1.6mm thick double-sided board, 2.0 copper thickness, and full tin spraying process to good passing performance of and small currents. Top-notch PCB quality.Using a fully enclosed dust-proof potentiometer, the performance is more stable and more durable than ordinary potentiometers Fully shielded high-current inductors are used to clear and sound.1. Working : Class D2. Quiescent current: 50mA3. Work efficiency: 90%4. Rated output : 100W5. Frequency response: 20Hz to 20KHz6. Working voltage: DC18V to DC24V7. Maximum output current: 4A: TPA3116Type: Bluetooth amplifier board moduleType: amplifier boardType: Audio AmplifierType: digital amplifier boardcolor:BlackMaterial:plasticsize:135 x 90 x 40MMPackage Contents:1 x Digital AmplifierOnly the above package content, other products are not included.Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.