Highlights

• Flush-mount Z-Wave Plus contact sensor that sits inside a 0.75 in (19 mm) bore hole and disappears in the jamb.
• Magnetic reed switch with tamper contact, low-battery reporting, and up to 120 ft (36 m) line-of-sight range.
• Powered by a CR2 3 V lithium cell with typical life of one year depending on traffic and Z-Wave polling intervals.

Ideal when you want a hidden door or window trigger for security automations without surface-mount hardware.

Include the sensor via the Z-Wave JS integration; it exposes a binary_sensor entity for open/closed status plus battery level.