... light,led keychain,led light Function: not only for illumination, but also for decoration Can be as phone strap, can ... .etc. A good product for promotion and gift A gift not only for kids, also for adults 1.ITEM: YS014-32 ... Button Cell5.Material: ABS INSTRUCTIONThe button is at the bottom of the product.1. Turn the button on, the light ... . Turn the button off, the light off. Special design are welcome.