High-quality small solar module for projects, small chargers, small solar applications. Rated output 2V DC, 400mA. Nut and bolt connectors on back of panel. Measures approx. 4 7/8" X 3 1/8", approx. 1/8" thick. One panel can charge one 1.2V rechargeable battery. Wire 2 in series and charge 2 batteries. Use blocking diode to prevent power leakage at night. Encapsulated in urethane, weatherproof surface.