The Goal Zero Nomad 28 Plus Solar Panel charges compatible USB devices directly from the sun to keep you connected far from the nearest electrical outlet. Solar Intensity Indicator+ Junction Box with easy-to-read LED indicator displays strength of solar conditions with immediate feedback in your search for optimal panel-to-sun placement. With the ability to track power-flow history, the Nomad 28 Plus knows the difference between a device that has reached a full charge and one that disconnects due to environmental causes, i.e. lack of sunlight, shadow, etc. When the latter is detected, the Nomad 28 Plus will automatically reconnect the charging device. Weatherproof layering protects against the elements. Detachable kickstand ensures optimal solar angle placement. Vented pocket ensures temperature regulation. Power-flow indicator. Solar panel has a 28-watt capacity with USB 2.4A output. 12.1L x 31.6 x .5 Wt: 3 lbs. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Solar Panels.