Bling Bling Butterfly Sense Flash Light LED LCD Color Changed Back Case Cover For Apple iphone 4 4S 4G 100% Brand New and High Quality!!! Note:It is very normal for the case to falsh when no calling or answering , no sending or receiving message , maybe it sensed other signals,so pls take easy to it . Assembly of Battery:1.Push the battery to the right to see the LED on,the light will go off after seveal flashes . 2.Attach the case to Phone. Package includes:1 x Flash light Case for Apple Iphone 4 4S (flash colorful); 1 x CR2016 Button Battery Our products are all from factory direct supply, we can guarantee 100% inspection before shipping. If any problems of our products really exist, an exchange or a refund is available