The Brunton SolarPort 4.4 Charger is an innovative energy alternative to keep your cell phone running, your GPS tracking, and your digital camera recording images. Just plug your device in, and let the sun do the rest. The SolarPort 4.4 charges your electronics through a USB connection, and its durability is unprecedented. Take advantage of the Brunton SolarPort cable-free 12-volt connection in the hinge, and link up to three units together to increase power output.