ZK1002M 2.0 Stereo BluetoothCompatible 5.0 Amplifier Board Powerful 100W100W output delivers clear audio performance across multiple sources including AUX, USB, and BluetoothCompatible BluetoothCompatible 5.0 technology provides a stable connection up to 15 meters without obstacles; easily switch between AUX, USB, and BluetoothCompatible inputs for a tailored listening experience Builtin protections guard against overcurrent, overheating, and short circuits, safeguarding your system and enhancing longevity; ideal for 20200W speakers rated at 48Ω for dynamic audio Compact and lightweight design at 60x60x29 mm and approximately 104 g; spacesaving solution without compromising performance; efficient 36x25x10 mm heatsink ensures heat dissipation during prolonged use Practical applications: Upgrade a compact home stereo or bookshelf system with 48Ω speakers using AUX, USB, or BluetoothCompatible sources DIY audio projects such as a PC speaker setup, mini amplifier, or portable audio device Small venues or desktop PA needs where space and wiring flexibility are important