JOINNEW@ Dragon Sense LED Flash Light up Case Cover for Apple Iphone 4 4s 4g ---100% brand new and high quality; ---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 iPhone. ---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 . ---Package includes:1 x Flash light Case for 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.