Description FM Radio: The headset can be used as FM radio separately, which search and lock channels automatically. Wireless Monitor: Place the emitter near babies, old people and sick people who need care, and the sound of the cared people can be heard from the receiver. Wireless Earphone: Wireless reception from any electrical device with audio output such as full-channel sound, PC, game player, DVD player, VCD player, audio device, MP3 player, and CD player. Wireless net chat---It's perfect audio-chat tool, provides infinite enjoyment. Specification Transmitter Power 2x AAA battery (Not included) Emission frequency 860.5MHz Modulation mode FM Emission distance 30 meter (ideal with no interference) Receiver Power 2x AAA battery (Not included) Frequency range 86MHz(Wireless headphone) 87-108MHz(FM radio) Reception mode FM Distortion ≤2% Notice: Battery and power adapter is NOT included Please read manual carefully before use