CHARMLUCK D5S SMART DOOR LOCK Charmluck D5S smart door lock Charmluck D5S smart door lock unifies the elements of the lock body with simple and strong lines, shaping the "sense of protection" and creating a "sense of security" at home. The main functions of the Charmluck D5S smart door lock are: fingerprint identification, password identification, smart card identification, APP unlocking, emergency mechanical key, emergency USB charging, and voice reminder.