Smart external door lock

Elegant high-performance smart lock with a black nickel design, combining security and ease of use. Supports multiple opening methods including app, fingerprint, password, card, NFC, and key, providing flexible and secure control. Operates efficiently in various weather conditions, supports backup power via USB, making it an ideal choice for external iron doors. (Includes protective cover for the external piece, keys, and RFID cards) Material: Aluminum alloys Color: Black nickel Opening methods: App, fingerprint, password, card, NFC, key Front panel dimensions: Height 156 mm × Width 59 mm × Depth 35 mm Back panel dimensions: Height 100 mm × Width 176 mm × Depth 58 mm Power source: 4 AA alkaline batteries Backup power support via USB: Yes Suitable door thickness: From 30 to 60 mm Suitable for doors: Wooden or metal Operating temperature: From -25℃ to 60℃