Features: Good Design:Passive audio switcher, ultra-compact, made of solid durable metal housing, needs no external power supply to work--plug and play. High Sound Quality:It ensures stable transmission, to deliver lossless, sound without noise, very suitable for home stereo system. 4-in & 2-out:The selector is used for four amplifiers to two speakers--convenient, flexible solution of audio distribution.(300W peak per channel) Independent Control:Each channel of input/output has its own separate switch button(use: select one/two audio output, one audio source among four). More Details:This audio signal distributor is designed with standard banana jacks, protection circuit to safeguard the amplifiers/speakers. Specifications: Material: Metal + Electronic Components Color: Black Input: 4-Channel Output: 2-Channel Power: 300W Max (Each Channel) Frequency Response: 10Hz-50kHz Output Impedance: 4~16Ohm Interface: Banana Jack Item Size: 240*105*55mm / 9.44*4.13*2.16in Item Weight: 930g / 32.80oz Package Size: 26*18.5*6.5cm / 10.23*7.28*2.55in Package Weight: 1090g / 38.44oz Note: Audio switcher and cable only, other accessories in the pictures are not included. Due to lighting or other reasons, the picture and material object may slightly differ. Due to manual measurement, there may be deviation, please in kind prevail. Packing List: 1 * Audio Switcher 1 * Cable