2x VISION Z-Wave Tilt Sensor for home automation Model: DHS-SNS-TS-VIS
These were used to detect if garage tilt door were open/closed but can be used for other purposes. They include a secondary binary input that can be connected to many other sensors. I recently changed my door to roller so don't need these any more. Worked really well. Comes with batteries. Australian z-wave version (921.42 MHz) More information: https://www.gadgetautomation.com/product/vision-z-wave-tilt-sensor/