C-zone 3ft Cable Digital Audio Optical Switcher Fiber Cable Toslink 3-Way Selector Switch Hub Connects 3 Digital Audio Sources To a Single Digital Audio Output, OR A Signal input to 3 output 3 Input Fiber Optic Toslink Digital Audio Switching Output Connects Directly Into TV Of Home Theater Receiver PCM, Dolby Digital & DTS Signals Can Pass Through This Unit Expands The Capacity Of A Home Theater's A/V Inputs There are four optical digital jacks. The output jack connects to the main unit to which you would like to expand the number of optical jacks (normally a digital audio/video receiver/amplifier). The three input jacks connect to the source devices and allow you to output digital audio to your main unit. Switch easily between sources instead of disconnecting and reconnecting cables when needing to change inputs. The compact design will fit in tight areas between components Home/portable digital audio components with optical connection, MP3/CD/DVD player including Blu-ray/HD DVD, video game consoles (PS3/XBOX360), computer sound card, cable/satellite receiver to your home theater system with a digital optical input.