Keedox&reg; 8.5-Watt Solar Battery Maintainer 12V Solar Panel Trickle Charger with Cigarette Lighter Charger for Automobile Car Marine Boat Motorcycle High qualityimported high conversion efficiency panel; Convenient and practical; Safety and environment; Can work in bad condition; Long span life; Easy to use, just Plug into cigarette lighter Material: single crystal solar panel(imported from Germany); Max output: 500MA 18V 10000Lux; Power: 8.5w Max; Temperature: 0-60 degree; Weight (approx.): 0.6KG; Size: 36x16.5x0.5cm This product is designed to supply power for outdoor 12V applicationssuch as automobile, Camping car, marine, Motor etc. It can charge your motor battery and keep enough capacity to protect the battery. It is convenient, environment, safety to maintenance your car battery at anywhere. Zero maintenance, Set on dashboard to charge, plugs into cigarette lighter socket; Weather rust shock UV resistant frame, Works under the cloudiest conditions; UV, rust and shock resistant Charge Hi tech appliance via USB connection (enough power out put to charge multiple appliances via a USB multi board connector not supplied with unit); LED light indicates charger is working, Rugged tough plastic, waterproof casing; The solar panel will automatically charge your battery even on cloudy, overcast days.