ROMOSS Sense 4 10400mah Dual USB Portable Charger External Battery Pack Power bank. High Capacity: Grade A Cell Used to assure you a highest quality and reliability. 10400mAh, 500+ recharge cycles over the life of the battery. Compact profile, sleek gloss exterior and intuitive design combine for comfortable palm-held use, 4 LEDs to indicate charge levels, enter power saving mode after 1 minutes. Charging while Discharging: Special design allows charges the device while being charged, Charge two smartphones or an iPad at full speed (USB Output 1: 5V 2.1A, USB Output 2: 5V 1.5A), it saves your time.