Acrylic protective cover design provides physical protection and safety while protecting internal components. Protection features include reverse connection protection, overvoltage protection, undervoltage protection, over temperature protection, short circuit protection, and self recovery overheating protection. The amplifier module offers a terminal block and a DC 2.1 mm socket, compatible with most laptop power ports. It can directly connect to wireless 5.0 devices and is compatible with a variety of speakers. Built in filter capacitor enables processing of sound signals. The knob potentiometer design allows convenient control of power on and off as well as V and V adjustments. Two power amplifier boards are included, available in 20W, 30W or 50W ratings per board, suitable for connecting to 4 to 8 ohm speakers. Supports stereo audio input and AUX audio input. Use scenarios DIY stereo or Bluetooth speaker upgrade for home: pair with wireless 5.0 sources and drive two sets of speakers with clear stereo sound and simple on/off and level adjustments. Small room multimedia or home theater: deploy two amplifier boards to handle moderate room acoustics with stereo input and AUX input for versatile source options. Portable or small event use: configure as a compact PA or classroom speaker system using the protective cover for durability, with straightforward wiring via the terminal block and 2.1 mm power supply.