With the LOQED Touch Smart Lock Black, keys are no longer necessary. You connect the smart door lock to your mobile via Bluetooth and then open it with a single touch. The Smart Lock has two sensors. One for indoors and one for outdoors. This allows it to keep an eye on where you are so that the lock only opens when you are actually standing in front of the front door. So if you come from behind, it stays closed. Is your mobile phone battery flat? Then open the lock with a code. This also gives others access to your home when you are away. You can also open the door remotely with the app. The lock is powered by AA batteries. When these are almost empty, you will receive a message.