Purchased in February 2023 for 21,505 yen. Selling because the size no longer fits due to moving. It was working without any particular problems. The door knob size is L, and there are no other sizes. There is no dedicated tape, so please purchase and use strong double-sided tape. Included items: Please check the photos. ・One main unit ・One open/close sensor Please purchase only if you understand that this is a used item and has been stored at home. ※No claims and no returns accepted.