Thank you for viewing. I used this for about half a year. There are traces of double-sided tape on the back of the lock. It was working without any problems. Please check the accessories in the photos. There is one set of replacement double-sided tape, so I think it can be used immediately. Operation confirmed, smartphone linked, authentication unlocked, battery level unknown (AAA batteries) Please understand that this is a used item and has been inspected by an amateur, and purchase after confirming the images. Please note that we cannot accept claims or returns. - Type: Smart Lock - Included Remote Control: With remote control - Color: Black - Features: Dial lock - Size: Compact Thank you for viewing.