Specifications: 1) Frequency: 88.5mHz 2) Work distance: 5 ~ 15 meters 3) Transmitter: 2 AAA batteries 4) Headset: 2 AAA batteries 5) On / off switch 6) Two parts of transmitter and wireless headset 7) Adopts the latest wireless transmitting technology to receive the sound signal without cord 8) With FM radio, search channel automatically and receive the FM broadcasting 9) Cute design Packing: Retail packing