1,Battery +protection case 2 in 1 combo features ,perfect solution for iphone signal problems. 2,Elegant design and use friend ... Output:5V/0.5A6. Charging time:2-3hr1,Compatible with Iphone, ipad ,ipod ,Nokia,Blackberry,HTC etc .2,smart shape ... indicator integrated5,use iphone original interface ,no additional wiring to charge the battery ,safe and convenient . External Battery Pack 1200 mah power ...