Eveready rechargeable fan with led light works on ac power (electricity) as well as dc power - built in rechargeable battery works during power cut. It is an adjustable fan at 180 degree rotation.This two speed fan comes with 150mm sweep. It has 16led light and an auto on features that automatically turns on the light when there is no light in the room. It has a super bright white led light. It also has an adjustable fan speed of high and low depending on the kind of air you would want the fan to give. It also has an air throw direction of upto 90 degrees. this fan comes with overcharge and deep discharge protection. Approximate run time when you use the fan and light both is 2.5 hours and if you use only the light then it will run for approximately 20 hours when fully charged. Initially it takes approximately 20-24 hoursto charge this device completely and regular charging takes approximately 16 hours.