Portable power pack dual usb charger battery capacity 20 000 mah interfaces microusb usb interface input 1x micro usb interace output 3x usb type a power output max 24 dimensions 210 x 80 x 23 mm weight 542 g features onoff switch battery indicator colour white rechargeable battery technology li ion output voltage 5 v operating voltage 5 v material plastic charging function charges 3 devices simultaneously compatible smartphones apple iphone 6