... s very convenient and easy to use. This led card products very similar as a normal credit card which can ... be put into your wallet, purse, or pocket with ease. It's easy to ... the perfect experience.(7) With CE and ROHS Certificate.How to use and replace battery : Fold "Light Bulb"up, ... on,put"light Bulb"down,light turns off.Use 1*CR1216 button cell (included) Photos for ...