The SONOFF SenseGuard DW Gen2 is a Zigbee door and window sensor designed to improve home security while enhancing comfort and energy efficiency. With smart detection of opening, closing, and tampering, it can instantly trigger alerts and advanced automations.
Compact, lightweight, and discreet, it installs easily on all types of doors and windows, including narrow frames or wide gaps. Powered by standard AAA batteries, it delivers up to 3 years of battery life with minimal maintenance.
Main Features
Accurate detection of door and window opening or closing
Anti-tamper alerts for enhanced security
Triggers smart scenes such as alarms, cameras, or lighting
Automation for improved safety and reduced energy usage
Flexible horizontal or vertical installation
Compact and discreet design
Remote monitoring of sensor status
Voice control via compatible platforms
Advanced Security with Tamper Detection
Equipped with an intelligent anti-tamper feature, the SenseGuard DW Gen2 detects any forced removal or unusual interference. When triggered, it sends instant notifications through the app and can automatically activate security scenarios.
Smart Automation and Energy Efficiency
As part of a home automation system, this sensor can initiate camera recordings, activate alarms, or switch off heating and air conditioning when a window is left open, helping to lower energy consumption.
Flexible Installation and Design
Supports horizontal or vertical mounting
Works with larger gaps between sensor and magnet
Detection range: 30 mm (horizontal), 15 mm (vertical)
Detachable magnetic design
Weight: approximately 45 g
Technical Specifications – SONOFF SNZB-04PR2
Brand: SONOFF
Product name: SenseGuard DW Gen2
Model: SNZB-04PR2
Series: SenseGuard
Product type: Zigbee door/window sensor
Wireless protocol: Zigbee
CPU: TLSR8656F512ET32
Power supply: 3 V
Batteries: 2 × AAA
Battery life: up to 3 years
Anti-tamper function: yes
Compatibility
eWeLink app
SONOFF ZBBridge-U
SONOFF iHost
SONOFF eWeLink CUBE
Apple Home via Matter bridge
Home Assistant (ZHA / Z2M – script required)
SmartThings (script required for tamper detection)
Compatible voice assistants via cloud integrations
