1、Good Design: Passive audio switcher, ultra-compact, made of solid durable metal housing, needs no external power supply to work--plug and play. 2、High Sound Quality: It ensures stable transmission, to deliver lossless, sound without noise, very suitable for home stereo system. 3、4-in \u0026 2-out: The selector is used for four amplifiers to two speakers--convenient, flexible solution of audio distribution.(300W peak per channel) 4、Independent Control: Each channel of input/output has its own separate switch button(use: select one/two audio output, one audio source among four). 5、More Details: This audio signal distributor is designed with standard banana jacks, conservation circuit to safeguard the amplifiers/speakers. Specifications: Material: Metal + Electronic Components Color: Black Input: 4 Channel Output: 2 Channel Power: 300W Maximum (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 1 * Audio Switcher