Wireless headphone Wired headphone FM Radio receiver Online chat Frequency range -83 - 108Mhz Maximum receiver distance :30 m Multi-direction receiver, could receive signal behind the door or wall Multi-headphone receive signal from the same transmiter Multi-function input: computer, TV, VCD, CD, Hi-Fi, etc Applicable for TV set, computer, DVD/VCR player, and other electronic products with audio output. Perfect working condition. Contact me and is yours. There is no need to email me for availability. As long as the ad is up it is available. Only serious inquiries please.