This 120 Watt Foldable Solar Book Charger Kit includes 4 sets of 30W Foldable Book Chargers. The solar charger converts light energy from the sun into electrical energy, that can be used for automotive battery charging or powering and charging your USB connected devices. It includes a DC socket that can be used to charge batteries. The 4 solar panels included in this kit can be used individually or in tandem; giving you the ability to connect up to 4 different power configurations - 30W, 60W, 90W, and 120W. The compact foldable design is durable, weather resistant and ultra thin, and is suitable for camping, hiking and outdoor activities. This solar panel features a premium ETFE covering film which provides you with a high absorption rate of sunlightKit Includes:2 x USB A sockets DC 5V 4.2A (MAX)DC socket 18V 1.65A (MAX) each (or) 6.60A (MAX) if all 4 x 30W Solar Book Chargers are linked togetherFolded Size: 208mm x 198mm x 40mm (each unit)Fully Opened Size: 725mm x 413mm x 20mm (each unit)Selected stores only.