Specification: Item Type: Solar Panel Kit Material: Monocrystalline silicon Colour: as shown in the picture. Product size: approx. 280 x 280 mm/11.02 x 11.02 inches. Controller Size: Approx. 133 x 68 x 35 mm/5.24 x 2.68 x 1.38 inches Weight: approx. 577 g/20.4 oz. Power: 40 W. Open circuit voltage: 18 V. Short circuit current: 2A Output voltage: DC 18V 9V, USB 5V Waterproof rating: IP65 Conversion rate: 23-24% Controller Parameters: Controller Rated Current: 20A Voltage: 12/24V automatic USB voltage: 5 V 2 A. Standby current: <10mA. Package list: 1 x Solar Panel 1 x Controller 1 x Alligator Clip 4 x Suction Cups 1 x connection line. 2 x Chinese and English Manual Tips: 1. Please allow for a 1-2 inch error due to manual measurement. Thank you for your understanding. 2. Monitors are not calibrated the same, the colour of the item shown in the photos may be slightly different from the actual item. Please take the real one by default. 3. Without energy storage function. Features Lightweight and portable, easy to carry, suitable for outdoor cycling, mountaineering, hiking, camping, traveling, etc. Suitable for car batteries, automobiles, RVs, ships, planes, satellites, space stations, outdoor livestock, planting, tourism, solar street lights. Used to charge MP3 mobile phones, mats or other controlled devices. With two USB female ports, you can easily charge the device via a USB charging cable. High conversion efficiency, good output efficiency, low light efficiency, light weight, strong applicability. Easy to use, you can put the panel in the sun and use it to charge the device directly.