Features: [Versatile Amplifier and Speaker Switch]: This powerful amplifier and speaker switch can solve your connection problems. It supports two usage modes: forward connection with 4 amplifiers and 2 sets of speakers, or reverse connection with 2 amplifiers and 4 sets of speakers. [High Compatibility]: Our device is fully compatible with all types of amplifiers and speakers. It can accept heavy-duty speaker wires or speaker pin wires through the input/output terminal ports. It supports stereo speakers with an impedance of 4 to 16 ohms. [High Power and Quality Sound]: Each channel supports a maximum power of 300W, ensuring high-quality sound without any loss. The switch signal is stable, and there will be no interference or noise between channels. [Easy Installation and Use]: The compact design and sturdy metal shell make installation simple. The device is plug-and-play, meaning you can enjoy a unique audio experience with easy installation. There is no need for an external power source. [Personal Listening and Monitoring]: The device includes a 6.35mm headphone jack for stereo headphone output, allowing for personal listening and signal monitoring. The headphone output has an independent volume adjustment. Specifications: Material: Metal iron shell Color: Black Input/Output: 4 sets of inputs/2 sets of outputs (banana plug) Channel Power: Each channel supports a maximum power of 300W. Product Weight: 850g/30oz Product Size: 24 * 9 * 5.5cm/9.4 * 3.5 * 2.2inch Note: Due to the different display screen and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Packing List: 1 x Power Amplifier Speaker Select Switcher