There’s no need for an electrical outlet with this ultra-lightweight solar charging system that fits right in your pocket! It works for USB devices like cell phones, iPads, Kindles and tablets or as a power source to recharge AA or AAA batteries. Includes USB port, built-in LED flashlight and four-pack of AA rechargeable batteries. 2 1/2" x 4" x 3/4". Weight (with batteries): 0.4lb. Compatible with the optional Nomad 7 Solar Panel.