How to Use: Just assemble the accessories, and the operation requires the customer to bring the controller. Specification: Item Type: Solar Panel Material: Polycrystalline Silicon Color: As shown in the picture Product Size: Approx. 54x28cm / 21.3x11.0in Weight: Approx. 731g / 25.8oz Maximum Power: 40w Output: Dual USB Open Circuit Voltage (VOC): 20V Short Circuit Current (ISC): 1.5A Solar Panel Power: 40w Application: 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: 1 x Solar Panel 1 x Clip 1 x Car Charger 4 x Suction Cup Note: 1. Please allow 1‑2in error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 3. Without electric power storage function.