Solar Energy Kit, includes: 1 Solar Panel from 6V - 6Watt, waterproof and super resistant. A V15 battery from 4000mA, rechargeable both from the panel and from the USB port, thanks to the USB-microUSB adapter included in the kit. By activating the "Always ON" mode on the battery, you can power your project on and on. Manufactured by Voltaic Systems. Panel dimensions 22 x 17.5 x 0.5cm.