SONOFF SenseGuard DW Gen3 Zigbee & Thread Smart Door/Window Sensor | SNZT-04P

The SONOFF SenseGuard DW Gen3 (SNZT-04P) is a slim door and window contact sensor that supports both Zigbee 3.0 and Matter over Thread, with tamper detection, versatile magnet mounting, and up to 15 months of battery life on two standard AAA batteries. When a door or window opens—or if the sensor is removed—it can send app notifications and trigger automations such as alarms, camera recording, lights, or climate control. Only one wireless mode can be used at a time. Matter-over-Thread use requires a Thread border router; Zigbee use requires a compatible Zigbee hub.

KEY FEATURES

• Dual protocol: Zigbee 3.0 or Matter over Thread (IEEE 802.15.4). Only one mode can be used at a time; switching modes restores the device to factory settings
• Matter-over-Thread works with Apple Home, Google Home, Alexa, SmartThings, and Home Assistant when a Thread-capable Matter hub / Thread border router is present. The sensor does not connect directly to Wi-Fi
• In Zigbee mode, add the sensor to eWeLink with a compatible Zigbee gateway. In Thread mode it cannot be added directly to eWeLink, because SONOFF gateways do not currently function as Thread border routers; it can be added to a Matter platform and then shared to eWeLink
• Tamper detection sends instant app alerts and can trigger automations if the sensor is forced off or tampered with
• Use open/close or tamper status in automations for security and everyday routines—camera recording, alarms, lighting, or turning off climate control if a door or window stays open
• Horizontal or vertical magnet mounting, with a detachable magnet for tight, uneven, or unconventional frames
• Detection gap up to 30 mm when the magnet is installed horizontally, or 15 mm when installed vertically
• Powered by two standard AAA (LR03) batteries (included) for easy replacement and up to 15 months of operation

SPECIFICATIONS

What's Included

• (1) SNZT-04P transmitter
• (1) Magnet
• (2) AAA / LR03 batteries (installed; remove the insulation sheet to power on)
• 3M adhesive
• Quick guide

NOTES

• The device ships in Thread pairing mode (green LED). Press the button five times to switch to Zigbee mode (red LED). Switching modes restores factory settings, and Thread and Zigbee cannot be used at the same time.
• Matter-over-Thread requires a Thread-capable Matter hub / Thread border router. The sensor does not connect directly to Wi-Fi.
• Zigbee mode requires a compatible Zigbee gateway. Recommended SONOFF gateways include ZBBridge-P, ZBBridge-U, NSPanel Pro, and iHost. Other compatible models include ZBDongle-P, ZBDongle-E, Dongle-M, Dongle-PMG24, and Dongle-LMG21.
• Align the marks on the transmitter and magnet as closely as possible. When a door or window is closed, keep the gap under 30 mm for horizontal magnet mounting, or under 15 mm for vertical mounting.
• Indoor use only. The user manual specifies mounting at heights of 2 m or less.
• Home Assistant via ZHA currently requires a script; official SONOFF materials also note a script for SmartThings, and Zigbee2MQTT version 2.14.2 or higher. See SONOFF’s instructions at help.sonoff.tech/docs/snzt-04p.
• Official product page: sonoff.tech. User manual: SNZT-04P User Manual (PDF).
• SONOFF lists a 2-year hassle-free warranty for this product.