The home USB charging block with the new intelligent IC technology, which can automatic recognize any USB devices, and the charger cube can auto shut off when battery is full. So you can rest assured when you charge your devices. USB charger plug with one port design provides fast charging speed for your cell phone to save more time. Input:AC 100-240V,Output:DC 5V/1A. Charging Phone Block size: 3.2*3.2 cm. Every weight is 25g. It's lightweight, Compact and easily portable. 3 Pack Chargers. You can place one in your office, one at home, and one on your car, or you can also share with your family and friends.