materials and durable connector: capable of handling large currents without generating heat, reducing the risk of overheating in demanding applications. Stable power supply: solid capacitors provide power storage and heat dissipation to maintain a stable and continuous power output. Enhanced Bluetooth version: Bluetooth 5.0 technology delivers higher transmission efficiency and an extended transmission distance for more reliable wireless connectivity. Easy volume control: a potentiometer with a switch enables convenient volume adjustment, designed for DIY speaker projects. Practical benefits: improves reliability in power delivery, supports longer wireless range, and simplifies user control for audio projects. Compatibility and performance: designed to work with Bluetooth enabled systems requiring stable power and straightforward volume management; built with durable materials to support ongoing use. Use scenarios: Build a compact Bluetooth speaker for home, classroom, or office use, with stable power and simple volume control. Upgrade a DIY audio project that needs reliable current handling and a convenient volume adjustment interface. Prototyping or educational builds requiring a clear, dependable power supply and easy, switchable volume control.