1. Wide range of applications 2. APP includes a shutdown function 3. Supports customizable 10-segment sound effects with adjustable settings to enhance audio performance for different speakers 4. Equipped with a mechanical switch for quick and convenient power on/off operation 5. Compatible with Wuzhi Audio APP for Bluetooth name customization, password setting, prompt sound volume adjustment, power on/off tones, sleep timer, sound effect selection, custom sound effects, and USB drive playlist management Power supply: 9-24V/3A (not suitable for AC connection) Bluetooth version: 5.1 Audio input: Bluetooth, AUX, USB, USB sound card Audio output: Left channel 30W + Right channel 30W Volume control: Classic mechanical knob with volume scale, stepless adjustment Power switch: Classic mechanical switch, one-turn operation, no waiting required Speaker adapter: 10-50W 8 ohm Protection features: Overheating, overcurrent, short circuit, and anti-static protection Color: Black Material: ABS Package Contents: 1 x Bluetooth digital amplifier board module (delivered in parts) Note: The package includes only the items listed above. Other accessories are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement error allowed within +/- 1-3 cm.