[Solar ]: 20w 12v Solar Panel with USB Out Put Port It can be used conveniently and quickly outdoors anytime, anywhere [Wide Applications]suitable for kitchens, greenhouses, pet houses, chicken coops, tree houses, etc., to maintain a comfortable temperature level [Working all day]The fan is equipped with a USB adapter, if you need the fan works at night, you can use a power bank and it can be used continuously day and night (The solar panel runs the fan fast under direct sunshine.the solar Fan will working more slow or stops working when the sunshine is weak) [Maintain Air Circulation] This portable can effectively help you maintain indoor air circulation. Keeping the air clean can help you eliminate the odor of pets, tobacco, etc [Easy to Install]The USB cooling fan is powered by a solar panel. It is easy to install, just connect the interface of the solar panel and the fan and put it under the to use. Power: 20w Fan size: 12x12 cm Voltage: 12 V Current: 800MA Interface output: USB + DC Colour:black Material:ABS Package Contents: 1 * solar panel 1 * fan 1 * car charger 1 * clip 1 * carabiner Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.