Features: Brand new and high quality Multiple channel input and output: Support 4 channel of Sound input and 2 channel of speaker output and switching of multiple Sound source to different speaker. Speaker Switcher: It have the function of speaker Switcher, which can flexibly control connection and disconnection state of speaker and facilitate the management of Sound output. Comparator design: Comparator technology ensures no loss of Sound transmission Power Amplifiers: Stability and reliability, ensuring sound signal transmission. Intelligent switcher function: It can control the switching of multiple Sound source inputs and speaker outputs to meet connection requirements of different Sound devices. Specifications: Material:Metal Size:Approx.240x105mm/9.45x2.13inch Package Includes: 1Pc Speaker Selector note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.