[Sensor upgrade] In order to avoid battery consumption during storage and transportation, we added a power button on the sensor, if not used for a long time, please turn off the sensor to extend the battery life.
[Distinguish Front and Rear Doors] All receivers will ring no matter which door is opened, but each door has a different tone, so you know where your guests are. If you want the sensor and receiver to work one-to-one, please try the steps in "How to clear the frequency and re-pair".