Maintain optimum power in any 12-volt battery with free solar energy. Maintenance-free with amorphous solar cells that charge in all weather conditions. Works in extreme temperatures from -40F to 176F. 1watt Power Sports model attaches with suction cups. Battery clamps included. 6,-watt and 18-watt have four pre-cut holes for easy installation. Includes CLA adapter and 10 ft. of wire. Charging kit includes four precut holes for easy installation, four stainless screws, battery clamps, CWA adapter, 12-ft wire, voltage tester and 8.5-amp charge controller. Available: 1-watt Solar Charger (14L x 4W x .25H) 2-watt Maintainer (13.5L x 5W x .5H) 6-watt Solar Charger (13.1L x 14W x .5H) 18-watt Solar Charger (38L x 13.5W x 1.5H) 18-watt Charging Kit (38L x 13.5W x 1.5H) 40-watt Charging Kit (25L x 49.5W x 2H) 7.5-watt Folding Charger (17.75L x 7.5W x 1H) 3.5-watt OBD2 Charger (13.75L x 5W x .5H) (Not Shown) 10-watt Solar Panel (26L x 14W x 2.75H) 8.5-amp Controller Protects 12-volt batteries from overcharging and discharge. Handles 8.5 amps of array current and up to 100 watts of solar power. Charging and full-charge indicator light. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Color: 18W Solar Charger. Type: Solar Chargers.