Functions: Good design: passive audio switch, ultra-compact, made of sturdy, durable metal housing, does not require external power supply to work - plug and play. High sound quality: provides stable transmission, providing lossless, original noise-free sound, very suitable for home stereo system. 4 inputs and 2 outputs: The selector is used to connect four amplifiers to two speakers - a convenient, flexible sound distribution solution. (Peak 300 W per channel) Independent control: each input/output channel has its own separate switch button (use: select one/two audio outputs, one sound source out of four). More details: This audio signal distributor is equipped with standard banana sockets, amplifier/speaker protection circuit. Specifications: Material: metal electronic components Colour black Input: 4-channel Output: 2-channel Power: 300 W Max (each channel) Frequency Response: 10 Hz-50 kHz Output Impedance: 4~16 Ohm Interface: banana socket Product Size: 240 * 105 * 55 mm / 9,44 * 4,13 * 2,16 inch Product Weight: 930g / 32,80oz Package Weight: 1090g / 38,44oz Audio switch and cable only, other accessories in the pictures are not included. Due to lighting or other reasons, the image and material object may vary slightly. Due to manual measurements, there may be a deviation, please take precedence. List of things to pack: 1 * audio switch 1 * cable