Ultra-compact and lightweight, stylish and elegant, waterproof and dustproof, introducing the latest innovation from Novobeam, the NBP3000, which is a portable, rechargeable battery pack/charger with a standard 5V/1A USB output and a capacity of 3,000 mAh, enough to fully charge most smart phones nearly twice, an affordable, durable, reliable and indispensable power source for your mobile devices wherever you go. As a portable high-capacity backup power source for your mobile phones and other compatible gadgets while you are off the grid, let it be enjoyable outings or unfortunate events such as a power outage due to adverse weather condition or a natural disaster, the NBP3000 comes in an ultra-compact size, comparable to a roll of mints and weighs less than 3 oz, making it effortless to fit in a pocket or a purse and convenient to carry around. Better yet, made of highly impact-resistance ABS plastic and equipped with unique Push-n-Seal technology, the NBP is durable, dustproof and waterproof, suitable for a variety of outdoor and sports activities. Sleek and stylish, the NBP3000 is built with the most advanced technology in mobile battery industry and compatible with virtually all USB portable devices, This compact and lightweight backup battery will be your backup mobile power source wherever you go. Never leave home without it because you never know when you might need it. Specifications: DC Output: 5V / 1A Standard USB DC Input: 5V / 1A Micro USB Capacity: 3,000 mAh Battery type: Polymer Li-ion Charging cycles: > 500 times Operating temperature: 14 °F- 113 °F Dimensions: 4 X 1 x 1 inches Weight: 3 oz What"s in the box: Novobeam NBP3000 mobile USB charger USB charging cable User guide