With the new sensor for the Nuki Smart Lock 3.0 and the Nuki app, your customers can keep an eye on the status of their door at all times. The Nuki Door Sensor gives users peace of mind that their door is closed and securely locked, even from a distance. Functions: Using the Nuki Door Sensor, the Smart Lock 3.0 reliably lets users know whether the door is open or securely locked. If the door is left open longer than usual, an alert is sent Auto Lock: locks automatically as soon as the door is closed Maximum security thanks to built-in tamper detection In addition to the usual "unlocked" or "locked" screens, the "door open" status is also displayed with a special icon in the Nuki app thanks to the Nuki Door Sensor.