This video audio switch allows you to switch between 4 different input sources on one display using a RCA composite connection (red, white, yellow). Simple and easy to install and operate. No power adapter is required. Product Specifications: Switch Between 4 different Video Sources on 1 Display Connector Type: 4 Input, 1 Output Eliminates Repeatedly Plugging and Unplugging Cables Compact Design Takes Up Very Little Space No power is required Black Metal Enclosure Manual Switching VIDEO: Input Level Resistance: VS0.8-1.0Vp-p/75 Output Level Resistance: VS0.8-1.4Vp-p/75/li> Support: 50Hz - 5.5MHz Input Connectors: 4 Output Connectors: 1 AUDIO: Input Level Resistance: 2V (RMS) / 47K Output Level Resistance: 2V (RMS) / 1K Support: 10Hz - 20KHz, 0dB Input Connectors: 4 (L+R) Output Connectors: 1 (L+R) Metal Enclosure Dimensions: (5.5" x 3.5" x 1.5") Package Includes: 1 x 4-way RCA Audio Video Switcher. User Manual Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store