What's in the box:

USB Siren Alarm Sensor Smart Sirene Alarm Temperature and Humidity Sensor Sound and Light Alarm USB Power Supply Compatible with 2.4GHz Home Security Zigbee Work With Gateway (Standard)

Features:
Smart Siren Alarm Sensor: download the Smart Life APP for free, simply paired with your smart phone, convenient to detect the temperature and humidity, and push notification to your phone.
Detect Temperature and Humidity: siren with humidity and temperature sensor, set the temperature and humidity alarm range that automatically alarms, remote on/off via APP.
Power Cut Memory Function: automatically restore the previous settings with memory function when network power off reconnecting.
Device Sharing & APP Recording: allow others to control the device, and support checking all the added devices alarm message in history.
Concise Style: mini compact siren alarm sensor is easy to use and its solid white appearance fits with houses in various decorative-style.
Wide Application: 40m wireless transmit distance, can be used in the living room, bedroom, bathroom, kitchen, office, school, store, garage, etc.

Specifications:
Material: PC+ABS
APP Name: Smart Life
USB Port: 5V/1A
Sound Intensity: 90dB
Standby Current: 61~180uA
Detection Temperature: -10~80?
Detection Humidity: 0~100%RH
Wireless Frequency: 2.4GHz
Communication Protocol: Zigbee 3.0
Wireless Standard: IEEE 802.11 b/g/n
Wireless Range: 40m
Power Supply: 2 * 3V CR123A battery (NOT included) or 5V/1A USB
Item Size: 68 * 68 * 32mm / 2.68 * 2.68 * 1.26in
Item Weight: 95g / 3.35oz
Package Weight: 144g / 5.08oz
Package Size: 9.5 * 8.5 * 5cm / 3.74 * 3.34 * 1.97in

Packing List:
1 * Alarm Sensor
1 * USB Cable
1 * Double Adhesive Tape
1 * Manual (English)

Note:
The device needs to used with ZigBee gateway.