This lightweight 4000 mAh rechargeable lithium polymer Grade A battery device is enough to charge smartphones, MP3 players and more. Reusable power bank charges via USB cable (included) which can recharge the battery backup or be used to charge up devices with a micro-USB input like Android smartphones from Samsung, Motorola, HTC, Nokia, and others. Input: 5V/1000mA. Output: 5V/1000mA. Media device not included. 0.375" H x 2.688" W x 4.31" L. Imprint area is 3.00" H x 1.50" L on Per side and includes a 1 Colour Imprint on 1 Location. Packaging: Bulk. Please call for rush delivery availability or multi-colour/multi-location imprints.