Hign-concerned Chemical:NoneElectronic:YESUsage Mode:ElectricApplication:BODYModel Number:YH-B-235Item Type:Massage & RelaxationMaterial:ABS & TPRBrand Name:GYLOVOrigin:Mainland ChinaCertification:CEType 1:Scalp MassagerType 2:Head MassagerType 3:Body MassagerType 4:Cat MassagerType 5:Muscles RelaxationUsers: 1. Face computer office workers for a long time 2. Those who keep the same posture for a long time 3. People who are nervous, insomniac and dreamy 4. Neck and shoulder stiffness, muscle fatigue 5. Old people, parents, lover, friends. Smart Scalp Massager is Great for everyday use How to use it Please make sure to relax before using this head massager,Hold it and put the massage heads onto scalp to massage head area. Short press the one control button if want to turn on the machine. Long press over three seconds when need to turn off. Short press can be switched speed and cyclically swicth of scratching.It has two modes of scratching(positive and negative).Two Speed (Low and High). Parameters Model: YH-B-235 Size:140*110*110 mm Power:DC 5V,1A Battery: 3.7 V Temperature range5~40 What's in the Box Scalp Massager*1 Charging base*1 Andriod Micro USB Cable*1 User's Manual*1