🔹Built to Last: Aluminium alloy, zinc alloy, copper alloy, stainless steel, acrylic, plastic materials, and fine polishing and plating processes make this product highly hard and durable. Its IP53 protection level ensures good waterproof and dustproof performance, allowing for use in various environments. 🔹Four Ways of Opening: This product provides you with 4 methods of unlocking the door (fingerprint, app, keycard, manual key), making it easy to open while increasing security and reliability. 🔹Smart APP Control: This door lock has a companion app that connects to unlock the door within Bluetooth range. It also tells you the record of opening and closing the door in real time, so you can know the security status of your home in real time. 🔹Large Capacity: This lock can store up to 100 fingerprints and 100 keycards, so it can be used at home or in the office for multiple people at the same time. 🔹Easy Installation: A simple structure, complete installation accessories, and an English manual allow you to install it in a few minutes. Details Two Keys: The product comes with two keys. You can carry one with you at all times to avoid the lack of electricity in the product. Emergency Power Port: The micro type-C charging port is a backup power port to unlock the door even if you forget to change the battery.  Smooth Surface: The product has a smooth, flat, burr-free surface, making it safer to use and easier to clean. Application It is suitable for doors of 1.38-1.77" in thickness. It can be used to replace the lock cylinder of the door in apartments, hotels, companies, homes, etc. Specification Material: Aluminium alloy, Zinc Alloy, Copper Alloy, Stainless Steel, Acrylic, Plastic Color: Silvery/Black Silvery Process: Fine Polishing, Plating Black Process: Polishing, Electrophoresis, Painting Power Supply: 1*CR123A Battery ( Not Included) Assembly Required: Yes Installation: Intermediate Applicable Range: Apartment, Hotel, Home Unlock Method: Fingerprint, App, Keycard, Manual Key Storage Capacity: 100 Fingerprints, 100 Keycards Service Life: About 100,000 Times Working Temperature: -20~60°C/-4~140℉ Working Humidity: 65% Protection Class: IP53(Dust and Splash Proof) Emergency Power: 1x Micro Type-C Charging Port Rear Twist Size: 31.4*34mm/1.24*1.34in Applicable Door Thickness: 35-45mm/1.38-1.77in Cylinder Size: 58*42mm/2.28*1.65in Lock Cylinder Length: 60mm/2.36in Gross Weight: 0.55kg/1.21lbs Package Size: 25*10*7cm/9.8*3.9*2.8inch Package Included 1* Lock Cylinder 2* Smart Keycards 2* Allen Key 2* Manual Keys 1* Screwdriver 1* English Manual Notes 1.Please check the cylinder length to make sure it fits your door before ordering. This product does not include batteries, please purchase CR123A Battery by yourself. 2.We sincerely recommend professional installation. Please keep your fingers clean when using this lock. 3.Please read the manual before operating this product, and keep it for further reference.