[Internet access]: Remote access via included 2.4GHz Bluetooth/Wi-Fi gateway in addition to the built-in Bluetooth connection. Also supports automation scenarios in the Tuya ecosystem. [Accessories Included]: Tuya compatible 2.4GHz Bluetooth/Wi-Fi gateway, 4 RFID tags (13.56MHz), 2 emergency keys, multilingual user manual (EN, FR, DE, ES, IT), M5×70mm and M5×50mm screws, Allen key to adjust the inner knob (screwdriver not included). [Durable Design]:For protected outdoor use,temperature range -25°C to +60°C,IP55 protection, aluminum alloy metal housing. Two emergency keys included to ensure access even in the event of defect or failure of the outer part. [Batteries]: Powered by 2 x CR123A lithium batteries (not included), with a typical run time of about one year with normal use. [Advanced User Management]: Manage access rights via the "Tuya Smart" or "Smart Life" apps. User related history with record of all opening and closing operations. [Opening methods]: code (<200), fingerprints (<50), RFID tags (<200-4 included), smartphone via Tuya app, emergency keys (2 included). [Applications]: Ideal for main or second residences, holiday rentals, nursing services, offices, warehouses or home use. [COMPATIBLE LOCKS]: Fits locks with Euro profile cylinder (types 4585, 5085, 5572, 6072, 6085, 7085, MUL-T-LOCK 235, etc.). Suitable for doors with 35-60mm thickness and 10mm protective plates or 50-80mm without plates. [Cylinder Length Adjustment]: Available lengths: 70mm, 75mm, 80mm. Distance between outer part and inner knob adjustable from 75mm to 95mm in 5mm increments. [Assembly & Notes]: Requires precise dimensions (door thickness, trim plates, cylinder overhang). Multilingual instructions included. Recommended installation by a professional if uncertain., Weight: 1.212542441 pounds, Manufacturer: Smart-Home