Solar battery charger and solar battery pulser combination unit - 5 watts. Solar charging system and pulsing system - 5 watt the 5-watt charger combines pulse technology with an exceptional charging system. This technology safely prevents the main cause of battery problems and failure: sulfation buildup on lead-acid battery plates. Used extensively by the U.S. Military worldwide for over ten years, this technology has been scientifically proven by two major universities to make batteries work harder and last longer than you ever thought possible. Benefits . Ideal for virtually any kind of vehicle and Equipment in areas without access to electrical power, including motor carriers, cars, trucks, emergency vehicles, rail cars, boats, recreational vehicles, generator sets and much more. . Unique industrial-strength 5-watt panel is almost half the size of other 5-watt solar chargers yet provides full 5-watt power . Smaller panel provides more installation options . Works with every type of lead-acid battery (flooded cell, agm and gel) . Cleans battery plates of large damaging lead-sulfates so batteries can accept, store and release maximum power when you need it . Helps offset energy-robbing key-off parasitic loads . Ideal for virtually any kind of vehicle and Equipment in areas without access to electrical power . Low-profile industrial-strength solar panel mounts flat (no frame required) so it's virtually indestructible . Prevents the normal loss of battery power on vehicles stored outside no matter how long they sit unused - even months at a time . Helps extend battery life up to 3X longer . Five-year limited warranty specifications solar charging and pulsing 5 watt 1220O2M5TUM specifications: pulse frequency 22-28 kHz Max charging dc voltage 16.5V, 350 ma reverse polarity protected circuit box dimensions 3.25 inch x 2.25 inch x 1.5 inch solar panel dimensions 8.875 inch x 8.75 inch x 125 inch box to lugs wire length 3 feet box to panel wire length 17 feet termination 375 inch lugs WEIGHT 1.6.