XANTECH 29110DB Designer Hidden Link Infrared Receiver Small, shelf-top IR receiver 7-foot cable with 3.5-mi,,imeter stereo mini plug that permits direct plug-in to Xantech connecting blocks with IR RCVR or AUX jacks Red talkback led tests system for correct wiring as well as indicating IR reception Attractive case for shelf-top locations IR modulation frequency bandwidth: 30 kHz - 100 kHz