Features: brand new and high quality RCA L/R stereo audio switcher 4 IN 1 OUT or 1 IN 4 OUT. Suitable for multiple sources signal select or multi-room paralleled amplifier or active speaker distribution of the same signal playback. Use audio rotary switch/Lossless device, easily switch between different audio in or out. Compact easy to place and suitable for your desktop and office. Plug and play,no power needed. Package Includes: 1x Bi-Directional Audio Switcher Specifications: Material:Metal Size:3.62x4.21x1.61in Color:Black note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.