This product is a set of Features - Color: Black. - Material: Monocrystalline silicon, plastic. - Solar Panel Size: Approx. 31.00X19.00X0.25cm/ 12.18X7.47X0.10in. - Maximum Power: 18W. - Short Circuit Current: 1.5A. - Work Current: 1.2A. - Work Voltage: 18V. - System Voltage: 18V. - Open Circuit Voltage: 20V. - Outgoing Interface: Dual USB plus DC interface. m onocrystalline silicon and plastic material, durable and practical for long-lasting use. - Suitable for car batteries, cars, RVs, ships, airplanes, satellites, space stations, outdoor breeding, planting, tourism, solar street lights, etc. - Using advanced polyethylene coating technology, the surface of the battery is coated with dark blue reflective film evenly, and the color is beautiful. - Adsorbed on the glass with a suction cup is more susceptible to sunlight, and the absorption effect will be better. - It can absorb sunlight and transfer the solar energy into electricity power .