See Door Sensor installation instructions here
The HangarBot Door Sensor and the connected HangarBot Hub (sold separately) provide peace of mind by alerting you of a possible breach or a door left open accidentally.
The wireless HangarBot Door Sensor is powered by rechargeable batteries that can last up to 6 months.
HangarBot Hub or HangarBot Camera Hub
HangarBot Door Sensor
Apple® or Android smart device
HangarBot app (Latest Version)
Cellular Data Plan