Rose S Line LED Changed Color Sense Flash Light Wire Drawing Case Cover For Samsung Galaxy i9500 S4 IV Hard Stainless Steel Back Shell Skin Colors:Black,Blue,Silver,Rose(Our default is Rose color,if you want others,pls feel free to contact us,thank you!); Package includes: 1 x Flash light Case for Samsung Galaxy S4 i9500 (Flash colorful,default Black color); 1 x CR2016 Button Battery; One 3V Lithium battery CR2016 is included(Pls note :the negative side is up when push it into the back cover); Can be replaced when used up ; 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; How to use it: There has a lithium battery inside the case, please put it into the case battery position with the letter side updown, and gently push the battery to the right part, the case will shining very cool.