This ultra-compact Wuzhi Audio ZK-502L Bluetooth Amplifier Board delivers powerful 50W+50W dual-channel stereo output for minimalist DIY audio projects. Powered by high-efficiency Class-D technology, it features stable Bluetooth 5.0 wireless streaming and focuses on a clean, wireless design without analog input ports. An integrated rotary volume dial functions as a physical on/off switch, letting you effortlessly power up or shut down connected 4-Ohm to 8-Ohm passive speakers.