Features1Carefully select materials, produce products, and restart without waiting, dual-output voltage regulator protection, and dedicated controllers to protect battery usage. 2With light, it can free up fixed charging and start charging autonomously. It can supply power to 5V products through USB output, and 18V output can provide emergency recharge for car batteries. 3Dual USB interface: This high-quality handmade solar charging board has USB and DC output, which can charge two devices at the same time. 4With 4 suction cups, installation is more convenient. Suitable for security cameras, laptops, car batteries, automobiles, airplanes. 5It is made of monocrystalline silicon solar cells with an efficiency of up to 21%.SpecificationItem Type:Solar Panel ControllerWeight: Approx. 483g / 17.0ozMaterial:Monocrystalline siliconProduct size: about 43.5x20CM /17.1x7.9in(with power storage function)Maximum power (PMAX): 20wOpen circuit voltage (VOC): 20VShort circuit current (ISC): 1.5AOutput: Dual USB plus DC5521Working current: 2 (A)Working voltage: 5-18 (V)System voltage: 18 (V)Suitable for security cameras, laptops, car batteries, automobiles, tourist vehicles, ships, airplanes, satellites, space stations, outdoor farming, planting, tourism, solar street lights, etc.Package List1x Solar Panel 1x Slot Clip 4x Suction Cup 1x Car Charger