Fangrui Product Details 8 Way Av Signal Input, 1 Rd Av Signal Output. 8-way Av Audio Video Selector Switcher Allows You To Connect Eight Audio Or Video Sources To One Tv Set That Standard Yellow-red-white Connectors Enabled. This Is Useful If You Have Limited Inputs On Your Tv, And You Want To Switch Between Multiple Devices Without Constantly Unplugging And Plugging In Cables. No Extra Power Supply And Software Drivers Are Needed, Just The Selection Button On The Composite Av Switcher Box To Choose The Av Sources. If You Want To Use One Of The 8 Connected Devices, Just The Button Switch Rather Than Discommodiously Reconnect The Audio And Video Devices Again And Again. The Metal Casing Of This 8-port Audio Video Selector Switch Provides Excellent Durability And Resistance, Ensuring A Long Lifespan And Stable, Reliable Connections. And The Simple Button Switch Allows For Easy Operation. Applicable To Dvd/vcd/vcr, Special Type Of Television Game Player. Be Suitable For Family, Hotel, Karaoke, Shopping, School, Factory And So On.