HE3-10KU2 is a portable power pack with 10400mAh internal Li-ion batteries, which provides a charging source for your smart devices through standard USB 5V port. With HE3-10KU2, you can charge your devices on the road anytime and anywhere. It contains powerful 2A input current that can be recharge within 8 hours. Highly efficient charging performance can fully recharge 10400mAh during your bedtime. It also provides one 2.1A and one 1.5A output for 2 devices charging at the same time. Its elegant and compact design provides a balanced proportion ergonomically and visually that user will hold it in one hand with perfect comfort.