Color A smart door lock Key benefits Multiple unlocking options to suit different needs: swipe card, fingerprint, mechanical key, password, and APP access. Reversible handle fits left or right opening doors, eliminating the need to different models for different door directions. Wide compatibility with most residential and commercial doors, covering a door thickness range of 35 to 100 millimeters. Designed for flexibility so one lock can work on wooden doors, steel doors, brass doors, stainless steel doors, and other common door types. Reduces reliance on single access methods by offering backup options including mechanical key and APP control. Main features Color: A Handle direction: Reversible for both left and right opening doors Suitable door thickness: 35 to 100 millimeters Unlocking methods: Swipe card, fingerprint, mechanical key, password, APP Applicable door types: Wooden door, steel door, brass door, stainless steel door, other compatible doors Why customers choose this lock Versatile access: Choose the method that fits your routine, from quick fingerprint entry to remote control via APP. Flexible installation: The reversible handle and broad thickness range make it compatible with most existing doors. Backup options: Mechanical key and password entry provide alternatives if electronic access is unavailable. One solution for many doors: Works with a variety of door materials so it can be used for replacements or installations across different rooms and buildings. Sizing and note Please according to the size of your door lock. If you are unsure about measurements or compatibility, consult customer service before ordering. Use scenarios Home entry door: Install on a front or apartment door to enable fingerprint access for family members and APP control for remote entry management. Office or small business: Use swipe card and password functions for staff access while keeping mechanical key backup for management. Renovation or replacement: Suitable for replacing existing locks on wooden, steel, brass, or stainless steel doors with thickness between 35 and 100 millimeters. What to check before ordering Confirm your door thickness is within 35 to 100 millimeters. Determine door handing to confirm reversible handle will meet your installation preference. Verify which unlocking methods you require so the lock matches your daily use. If you need help with sizing or compatibility, please consult customer service at any time. Wishing you a happy life.