Features: ZK-F802 Digital power amplifier board with for high fidelity and two-channel stereo sound quality, pure and clear sound. 80wx2 Stereo bluetooth-compatible audio power amplifier, supports bluetooth-compatible, aux, u-disk and usb sound card audio input. Gold knob cap, elegant and elegant, with cool volume level indicator, 8-level brightness adjustment, 360-degree stepless tuning. 25x13mm heat sink, the heat sink is close to the for shell to assist heat dissipation, the bottom ventilation is not sealed, and the heat dissipation area is larger and more sufficient. Support Wuzhi Audio APP, you can modify the Bluetooth-compatible name, password settings, adjust the volume of the prompt, sound selection, customized sound effects, etc. Specifications: Item Name: 2.0 Channel 80Wx2 Stereo Bluetooth-compatible Audio Power Amplifier Model: ZK-F802 Features: Support Wuzhi Audio APP Bluetooth-compatible Version: BLE5.1 Audio Input: Bluetooth-compatible+AUX+U-disk+USB Sound Card Channel: 2-channel Working Voltage: 9-24V/4A(AC power not available) Output Power: Left Channel 80W+Right Channel 80W Compatible Loud Speaker: 20-100W, 4-8 Volumn Adjust: Multi-function knob, 360-degree stepless tuning, with volume level indication Single click: for play/pause; double click: mode switch (Bluetooth-compatible/U disk/AUX) Press and hold for 1 second: turn on/off; rotate: adjust the volume for Protection Mechanism: over temperature, over current, short circuit, anti-static for protection Material: Metal, Printed Circuit Board Size: Approx. 60x60x32 mm/2.36x2.36x1.26 inch Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Piece Audio Power Amplifier