Lock your door without a key with the Yale ENTR Kit YS-L1B. With this smart door lock you can unlock your door with your smartphone or with the supplied remote control. It is no longer necessary to give keys to all your family members or, for example, the babysitter. Give guests temporary access via the app and they come in easily. You lock the door automatically as soon as you close it. This way you know for sure that the door is not accidentally open when you are on vacation. Can't get a connection through the app? Then just open the door the old-fashioned way, with the supplied emergency key. From the inside you always open the door without a key.