No power supply and other software required; plug and play._x000D_ Compact easy to place and suitable for your desktop and office._x000D_ The passive RCA switch has a sturdy construction, beautiful appearance and reasonable design._x000D_ Compatibility: Used for Legacy Systems Game Console/ CD Player/ DVD/ TV/ DAC/ TAPE/ TUNER/ Tube Amplifier/ Digital Power Amplifier/ Headphone Amplifier._x000D_ Any device with L/R Sound Channel is compatible._x000D_ _x000D_ Specification:_x000D_ Interfaces: 5 x R/L Jack_x000D_ Knob: 1 x Selector Knob_x000D_ Analog signal maximum support 1.2V p-p I/o_x000D_ Input/output frequency range: 20Hz~20KHz_x000D_ Instructions for Use:_x000D_ 1. It can easily switch four L / R analog sound signal sources to one L / R analog signal amplification device._x000D_ 2. It can also assign one L / R analog sound signal source to four L / R analog signal amplifying devices, allowing you to switch easily._x000D_ colour: black_x000D_ Material: ABS_x000D_ Size: 10.8x9.2x4.1cm_x000D_ _x000D_ Package Contents:_x000D_ 1 x Stereo Audio Switch_x000D_ _x000D_ Only the above package content, other products are not included._x000D_ Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_