Features 1、STRONG COMPATIBILITY AND CONVENIENT APP CONTROL: Audio inputs support BT, for AUX, U disk, and USB sound card. Supports functions of the for Wuzhi Audio APP, allowing you to modify the BT name and set a BT password. 2、BT CONNECTION: BT 5.0 version for longer transmission distance. It can transmit up to 10 meters in an open environment. If your playback device does not have BT, you can still input audio signals through the 3.5mm headphone jack. It also supports U disk and USB sound card input, making it even more convenient to use. 3、EXCELLENT SOUND OUTPUT: The digital amplifier board guarantees high fidelity sound reproduction, allowing you to enjoy an immersive audio experience. 4、SAFETY PROTECTION: This amplifier board has protection against reverse connection, overheating, overcurrent, and short circuits. 5、COMPACT AND VERSATILE: The BT amplifier board is small in size, making it easy to install and suitable for various audio applications such as DIY speakers, sound systems, and multimedia projects. Specification Item Type: Audio Power Amplifier Module Material: ABS BT Version: 5.0 (unblocked Approx. 10m / 32.8ft) Sound Input: AUX, BT Number Of Channels: 2.1 Channels Input Sensitivity: 500mv Speaker: 20-100w, 4-8Ω Output Power: Maximum 50w (Left And Right Channels), Maximum 100w (Subwoofer) Package List 1 x Main Module 1 x Power Interface Accessory 5 x Knob 2 x Protective Shell 12 x Screw 4 x Accessory 1 x Screwdriver