[CODE OR KEY]This electronic door knob offers two ways to access,passcode or key,1 master code and 50 user codes. Access codes can be 1 - 15 digits in length. Ergonomic design can bring trendy style to exterior &interior doors. [SMART]This keyless entry door knobs lock with backlit keypad, so you can enter codes even in darkness. The visitor mode can be activated when many guests are visiting. Enable silent mode if you don’t want to disturb. low battery alarm. Use type-c USB backup in case that batteries run out. [STURDY]This keypad door knob adopts heavy-duty design, sturdy and durable. solid lock cylinder and premium metal construction. Auto-lock. Password disguise. Ideal for home, bedroom,office, hotel, garage, and apartment, etc. [SIMPLE]This password door handle set fits 1-3/8"(35mm) to 2-1/2" (65mm) thickness doors, with a 2-3/8"(60mm) or 2-3/4"(70mm) adjustable latch. Install it by yourself with just a screwdriver in minutes. Suitable for your bedroom , door entry or backdoor, etc. [DURABLE]IP65 weather resistance. Quality materials and industrial circuit design ensure this passcode lock reliable. They are awesome gifts for the people you love. Each door lock comes with long-term warranty and efficient service. Material： Zinc alloy Package: 1* Electronic Door Knob lock 2* Keys (KW or YL) 1* User Manual 1* Screw Set 1* Strike Plastic Box 1* Strike Plate Product Details: Finish: satin nickel/matte black Access: code or key 1 Master Code 50 User codes Length of Passcode: 4-15 digits Power supply: 4 * AA batteries (Not included), USB type-c backup (Cable Not included). Battery life : 2+ Years Latch: Adjustable 60mm(2-3/8") or 70mm (2-3/4") Door thickness: 35mm to 65 mm(1-3/8" to 2-1/2") Environment: IP65 -22F - +176F Function: Backlit Keypad/ Auto-lock / Visitor Mode/ Silent Mode/ Password Disguise, etc.