Designed with versatile plug ins, compatible with IOS or Android phone. The motor speed can reach 16000 RPM, bring you quite a breeze whenever and wherever you need an air to cool yourself down or sooth your mood. The fan is made of materials of high quality silicone, which is environmental and safe. Rubbery blades won't hurt or cut yourself if accidentally touch the blades with a part of your body. Power button free, simply plug in to turn on and unplug it to turn off. DO NOT touch the fan blades with your hands and DO NOT try to stop the blades while using. DO NOT keep the fan too colse to your face, eyes and hair. Please turn off the fan after a long time woking.It is best to turn off the fan for 10 minutes break after 2 hours continuous working.