Power Source: BatteryType:Air Cooling FanInstallation:TableMaterial:PlasticCertification:CE, RohsPower (W):4Voltage (V):3.7Brand Name:HtopsharpKModel Number:HF308 rechargeable mini usb fanPlace of Origin:Guangdong, China (Mainland)Speed mode:3 rangeBattery specification:Li-ion 18650-3.7VCharging time:3 hoursDimension(mm):110*103*64.5Charge:Input:5V Output:5-9VBattery installation:removableN.W.(g)(including battery):160g1.Humanized hand design 2.Apply to the umbrella while walking 3.Multifunctional design for office, pram, camping, bed 4.Foldable and portable, mini size, adjust to different angles ContactToddTopsharp8F, Huafeng 1th Technology Park B, Sanwei, Baoan, Shenzhen, CNT: +86-0755-23462931-808M: +86-13632623421QQ: 2763365947Skype:+8613632623421W: www.topsharp.hk