Reddit reviews IR Infrared Emitter Extender Cable Extension (10 Feet) Triple Head3 Eye 3.5mm Jack Infrared Red Transmitter Blaster Blink Eye Wire Cord Compatible with IR Repeater Extender System Kit, Xbox One
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Passes IR communication: Used with an IR Repeater kit to control a device; Extend remote control ability to any room in the houseFor use with infrared extender extension system, hidden Xbox One, Audio system, AV equipment and etcIMPORTANT: Compatible with devices in 38khzComes with adhesive backing sticks directly onto different devicesOverall length: 10 feet (3 meter)
Just to tack on, if you only need to extend the range a small amount or just need better Line of Sight, you can try to go with just the cable. The box isn't exactly necessary unless you are looking to really flood a room.
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