Sound Storm Laboratories SHP-IR Two Pair of Wireless Headphones with IR Transmitter Headphones can be used with IR transmitter included in this set or any monitors equipped with IR audio transmitter The IR Transmitter requires 12 Volt DC power input to work (you can connect this unit directly to your 12 volt DC car wiring) In order to use the IR transmitter for home audio you need 12 volt DC 1A/1000mA power adapter (not included in this set) Headphones Compatible With Monitors Featuring Infrared Audio Transmission