Features: It can only charger USB device AA battery ( both rechargerable and unchargerbale ) can be used and the output is always 5V 1A 4 x AA battery External emergency charger With 1 LED lights Portable design, easy to carry around Switch: Torch / OFF / USB Battery requirement: 4 x AA Battery(not included) With a USB interface, supports all devices that get charged via USB cable (USB cable not included), such as MP3/MP4 player, cellphone, iPod, iPhone, etc Size: 86 x 66 x 11mm(L x W x H) Package Included:  1 x Battery USB Power Charger Case (AA Battery and USB Cable not included)                                  Kindly Note:  If you need a huge quantity, contact us to get more competitive offer.  Shipping:    Shipped within 1 business days once payment done.  Ship via USPS 1st class mail with Tracking Number,25 days to reach you.  Refund and Guarantee: 30 Days Money Back Guarantee 180 Days Free Exchange Please contact us with any questions or concerns,we will solve it until you satisfy.