Hello dear O-Fan, Do you wanna turn it on? Remove the protective film from the lens, unscrew the body and remove the yellow insulating film. Then single click the switch on the top to turn on
To answer the question I think you’re asking, it isn’t necessary. Typically you register a product for the warranty. I can tell you from recent personal experience that Olight is all over it. If you have an issue, just go to “after sales” and find the order containing to offending product. There’s no need to register, no arm twisting required. They stand behind their product, plain and simple.