Features： 1、Carefully select materials, produce products, and restart without waiting, dual-output voltage regulator protection, and dedicated controllers to protect battery usage. 2、With 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. 3、Dual USB interface: This high-quality handmade solar charging board has USB and DC output, which can charge two devices at the same time. 4、With 4 suction cups, installation is more convenient. Suitable for security cameras, laptops, car batteries, automobiles, airplanes. 5、It is made of monocrystalline silicon solar cells with an efficiency of up to 21%. Specification： Item Type:Solar Panel Controller Weight: Approx. 483g / 17.0oz Material:Monocrystalline silicon Product size: about 43.5x20CM /17.1x7.9in(with power storage function) Maximum power (PMAX): 20w Open circuit voltage (VOC): 20V Short circuit current (ISC): 1.5A Output: Dual USB plus DC5521 Working 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 List： 1x Solar Panel 1x Slot Clip 4x Suction Cup 1x Car Charger