Features: Multiple Inputs and Outputs: Supports 4 Amplifiers input and 2 speaker output, realising flexible selection of switching from multiple source to different speaker. Comparator design: With comparator losslessly in signal transmission process, providing highly quality sound experience. Passived Amplifiers: can be used without external power, simple and fast, no interferences, to ensure transmission. Switching distribution function: can simultaneously control intelligents switching of multiple inputs and speaker outputs to meet diverses needs. For practitioners who need to switches and distribute complex equipment in studio mixing room. Specifications: Item: Signal Selector Switcher Type：4 Inputs and 2 Outputs Size：about 320x110x62mm/12.6x4.33x2.44in Package Includes: 1PCS Signal Selector Switcher note: Due to problemsof lighting effect and shooting there mightbe certain tolerances in product, please understand. Please allow 0-1cm error due to manuals measurment