Features:Transmitters and computer connections, wear can be accepted for freedom of movement within the room, truly wireless voice chat.Transmitters will be placed in infants, the elderly, the sick and other people in need of care side, the receiver can be used to listen to the voices of those being cared for easy care.Wireless headset receiver can listen to FM radio, electric tuner automatically find Desk, frequency stability.Connect any audio output device.High-fidelity sound, acceptable range of more than 10 meters.Specifications:Specifications:Earmuffs material: PU leatherHeadphone cable material: PVCColor: blackSize(L x W x H):about 21x16.3x8.5mmDistortion rate: 1%Impedance: 32Power Requires 2 x AAA batteries in the emitter and 2 x AAA Batteries in HeadphonesBatteries not includedSound principle: moving coilLead wire length: about 1.2mSensitivity: 108dBSpeaker diameter: 40mmPlug type: straight plug typeFrequency response range: 84-108HzPackage Included:1 x Headset1 x Stand1 x Audio cable1 x Manual Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.