The Goal Zero Sherpa 50 Inverter lets you convert your Sherpa 50 power pack into a wall outlet, The ""bolt-on"" inverter attaches directly to the Sherpa 50 battery pack,image converting the power flow from DC to AC, With the Sherpa Inverter attached, you can plug in any device directly - just like you would with a wall outlet, Size: 2"" x 1, 5"" x 5, 5"", SKU: GLZR047