There is a security sticker on the product’s packaging box. To authenticate the product, scratch the sticker to expose the security code; then log on to the official website and input the security code. If there is the prompt “The product you are authenticating is a genuine product of Leten brand series produced by Hong Kong Leten Co., Ltd., please rest assured to use!”, it indicates the product you bought is genuine; or dial security hot-line 4000-128-315. For some products, there are QR code security labels on the packaging boxes—scratch to expose a full QR code and scan with the phone to authenticate.