What's in the box:

SONOFF SNZB-04 ZigBee Wireless Door Window Alarm Sensor Wireless Automation Anti-Theft Alarm Compatible With ZigBee Bridge & WiFi Devices via eWeLink APP IFTTT Smart Home Security Alarm System (Standard)

Features:
* Intelligent Security: Sync the opening & closing status of door/window on APP. Remind you when the door/window is open and closed. Can make ZigBee and Wi-Fi devices keep linkage.
* Scene Linkage, Start Your Smarter Life: Have you ever thought to turn on/off your home lights through your action? Simply connect the sensor with your home appliance and you can make devices on/off when you open or close the door.
* Just Like A Police Is Patrolling Your Home: Worry that your home is threatened when youre away? Try to connect a camera to the sensor and you can scare the stranger off with your voice anywhere, anytime.
* History Records Check: Want to check the past message notification of your home? The motion sensor allows you to go back to the history records over past 3 months.
* Easy Installation & Share Control: Share the sensor to your family to together keep eyes on your home. Simply use adhesives tape to mount the motion sensor in your ideal locations just in seconds.
* Low-battery Notification: You will get a notification of low-battery level when the battery life gets 10% remaining.

Specifications:
Model: SNZB-04
Battery: 3V CR2032 (included)
Wireless protocol: Zigbee (IEEE 802.15.4)
Working environment: -10C~40C
Material: PC
Magnet Size: 32 * 15.6 * 13mm
Magnet Weight: 5.3g
Sensor Size: 47 * 27 * 135mm
Sensor Weight: 18g

Package Information:
Package Size: Approx. 5*5*3.2cm/1.97*1.97*1.3in
Package Weight: Approx. 40g/1.4oz

Packing List:
1 * SONOFF Zigbee Wireless Door/Window Sensor