Key Features ✅High-quality Material: This product is made of aluminum alloy, brass, and stainless steel after the polishing, electrophoresis, and painting processes, which is sturdy, and resistant to impact, corrosion, and wear. Its IP53 protection level ensures good waterproof and dustproof performance, allowing for use in various environments. ✅Convenient to Unlock: With four unlocking options including the manual key, smart keycard, password, and mobile app, you can come and go freely without worrying about forgetting your keys and cards. ✅User-friendly Design: Once the product is connected to the mobile app, you can set up and monitor the smart door lock with a temporary password, authorization management, unlocking history, and other functions, which are convenient for friends to visit your home and prevent strangers from opening the door. ✅Anti-snooping Function: Our product supports virtual anti-snooping passwords, which will be randomly entered before and after the correct password is entered, greatly improving security. ✅Battery Level Alert Design: It will alert you when the battery level of the smart lock falls below 20%, you can also check the battery level in the app. ✅Extensionable Design: The length of both ends of the product can be freely extended and retracted, so it can meet the thickness of 1.4-1.8in door panels. ✅Assembly in a Breeze: Without drilling or cable laying required, a detailed manual and practical tools allow you to install it easily and start to using it quickly. Details Suction Ring: It can be absorbed on the wall to hang up your keys, more convenient for your storage. Carrying Cord: Both the smart key card and reset card come with a carrying cord, you can tie it together with your keys to prevent loss. Emergency Charging Port: When the product is out of battery, it can be emergency charged through this micro type-C charging port to renew the door lock. Application It's suitable for 1.4-1.8in door thickness and European standard lock hole. It is suitable for homes, apartments, garages, basements, hotels, and offices. Specifications Material: Aluminum Alloy, Brass, Stainless Steel Surface Treatment: Polishing, Electrophoresis, Painting process Color: Black Style: Modern Shape: Round Assembly Required: Yes Installation: Intermediate Power Supply: 1*CR123A Battery ( Not Included) Unlock Way: APP, Password, Smart Keycard, Manual Key IP Class: IP5x(Dust and Splash Proof) Emergency Power: 1*Micro Type-C Charging Port Battery Level Alert: Below 20% Working Temperature:-20-60℃/-4-140°F Operating Humidity: 55% Scanning Time: 0.3s False Recognition Rate: ＜0.1% Rejection Rate: ＜0.1% Storage Capacity: 100 Passwords, 100 Card Pairs Door Thickness: 35-45mm/1.4-1.8in Gross Weight: 0.55kg/1.2lbs Front Part Size: 42*42*58mm/1.65*1.65*2.3in Back Part Size: 34*31.4mm/1.3*1.2in Product Shortest Length: 60mm/2.4in Package Size: 25*10*7cm/9.8*3.9*2.8in Package Included 1* Lock Cylinder 2* Smart Keycards 1* Reset Card 1* Setting Steps Card 2* Manual Keys 1* Screwdriver 2* Suckers 2* Allen Keys 1* English Manual Notes 1.Please check the cylinder length to make sure it fits your door before ordering. 2.We sincerely recommend professional installation. 3.Please read the manual and product labels before operating this product, and keep it for further reference.