Enhance the security and convenience of your doors with this advanced Keypad Door Knob Lock, crafted from premium aluminum alloy and stainless steel for durability and long-lasting performance. Designed to fit standard wooden, office, narrow, and eco-friendly doors with a thickness of 35 to 55mm (1.38 to 2.17 inches), this lock combines robust materials with intelligent features to protect your home or workplace effectively. Key Features: · **Premium Metal Construction:** Built with high-quality aluminum alloy and stainless steel, ensuring strength, reliability, and resistance to wear for everyday secure use. · **Extensive Password Capacity:** Supports up to 45 password sets, including 3 administrator codes and 42 regular user codes, enabling easy multi-user access management. · **Flexible Password Length:** Passwords can be set between 6 to 8 digits, offering customizable security levels to suit your preferences. · **Anti-Peep Virtual Password Function:** Allows entering a dummy password (up to 16 digits total) before or after the correct password to safeguard your code from prying eyes and prevent unauthorized access. · **Multiple Unlocking Methods:** Conveniently unlock your door using either the secure keypad password or the traditional key, providing versatility based on your situation. · **Stylish and Ergonomic Design:** Features a modern round ball shape measuring approximately 80 x 57mm (3.15 x 2.24 inches), blending aesthetic appeal with comfortable handling. · **Easy Installation:** Designed for quick and hassle-free setup on doors with thickness ranging from 35 to 55mm, making it perfect for homes, apartments, garages, offices, and more. · **Built-in Battery Powered:** Equipped with a built-in 3.7V 400mAh ternary lithium battery, ensuring reliable operation without the need for frequent battery replacements. Specifications: · Material: Aluminum Alloy, Stainless Steel · Weight: Approx. 678g (23.92oz) · Password Capacity: 45 Sets (3 Administrator Sets, 42 User Sets) · Password Length: 6 to 8 Digits · Virtual Password Guard: Supports up to 16-digit dummy passwords before or after the correct password · Door Thickness Compatibility: 35 to 55mm (1.38 to 2.17 inches) · Round Ball Knob Size: Approx. 80 x 57mm (3.15 x 2.24 inches) · Power Supply: Built-in 3.7V 400mAh Ternary Lithium Battery · Unlocking Methods: Password or Key Package Includes: · 1 x Keypad Door Knob Lock This keypad door knob lock is the perfect combination of security, technology, and style, providing peace of mind with multiple access options and anti-peep protection. Its durable metal construction and simple installation make it a practical choice for securing various door types in residential or commercial environments.