Genius Energy Mouse combines Power bank with wireless mouse that is perfect for charging your smartphone devices anytime, anywhere. Embedded with a 2700 mAh A grade Li-polymer battery, 1200 dpi, 2.4 GHz anti-interference technology ensures a reliable connection up to 30 feet. Four LED lights to indicate battery capacity as well as charging status. This 2 in 1 function saves travel storage space making Energy Mouse a top choice for travelers on-the-go.