Details: ① Purchased and installed new for a back door, but listing it due to infrequent use. ② Initialized after confirming normal operation. ③ One waterproof sheet (black oval rubber) for the entrance unit cover is missing. Also, the screws (2) for mounting the entrance unit on the wall are not the original ones. ④ Batteries are not included. ⑤ No original box. Reference: https://kakaku.com/item/K0000848154/spec/#tab Please ask if you have any questions.