The K-3 Power Tube 2200 is an on-the-go universal and USB portable charging solution that allows you to leave your power cords and wall plugs at home. The Tube is small enough to fit in your pocket or your purse. Portable, slim and lightweight, the Power Tube is the perfect way to ensure your battery won’t run out when you are on the go. The Tube has 2200 mAh capacity and is available in an array of colors so you can choose to mix or match. Compatible with virtually any USB powered device, you can utilize with your smartphone, PDA, tablet and/or camera and never miss a beat. Whether heading out on the weekly business trip or the vacation jaunt, don’t leave home without it!