TOSlink Pro Optical Splitter 2 cables into 1 socket or allows one cable connection to be connected to different sources. It should be noted that at least one device with this unit should be turned off, preventing "interference" from the unit remaining switched on, even in standby units like SKY HD will still emit a signal which will collide if left on (or in standby) if you don't want to switch on and off please check our 3 Way switch version, search "Ex-Pro Optical 3 Splitter" for this version.TOSlink Pro Optical Splitter 2 cables into 1 socket.The splitter allows one cable connection to be connected to different sources. For example, a DVD player and DVD recorder can use the same single amp input with this device! Ideal if you have run out of optical inputs. All contacts on the splitter are GP for a secure connection. 1 Input 2 Outputs  2 Outputs 1 Input  -->  (Used in this manner one device must be switched off otherwise the signal will collide and no output will be given).