Smart Lock Keyless Entry Door Lock Mobile App Control Access Code Deadbolt Digital Door Lock User Passcode, Auto Lock, IC Cards, Smart Lock for Home Office Bedroom, Black E04. Once you have this smart lock, you can control your door lock switch anytime and anywhere, never worry about not bringing the key or having relatives or friends visit you when you are not at home. Our smart deadbolts lock has multiple unlocking methods, including mobile app and Bluetooth unlocking, password unlocking, keyless and IC card unlocking. The installation of this smart lock is simple, and you can install it through videos or instructions without the need for punching or other operations, making it easy to complete your lock installation plan.Once used, the code is automatically deleted to ensure the safety of your home. Smart lock made of durable metal materials, enough to last for years, the waterproof level of this lock is IP54, Normally the batteries can last 10-14 months according to the frequency that you use the lock. When the battery dies, you can use keys to unlock. Any product you return must be in the same condition you received it and in the original packaging. We usually respond within 24 hours on weekdays. Thank you for shopping at our store!