Tuya Wifi Temperature Humidity Sensor, 100db Loud Alarm, 2 Power supply method including usb and battery (not included).

Features:
【APP Remote Control & Voice Control】No matter how far away from home, the warmth of home is in hands. Making your home smarter. Compatible with Amazon Alexa and for Google Home IFTTT for voice control.
【Siren with Temperature and Humidity Sensor 3IN1】APP sets the temperature and humidity alarm range in advance, detects changes in ambient temperature and humidity, exceeds the safety interval, and automatically alarms even in the absence of a network.
【100dB Loud Alarm & 18 Alarm Ringtones】When the siren alarm triggered, it will make alarm with both 100dB voice prompts and quick flash strobe. 18 alarm sound ringtones optional, with colorful life.
【2.4GH WiFi One-key Connect Easy Setup】Don't need home gateway, you can easily achieve the intelligent control of home appliances, simple operation, easy to use.
【Dual Power Supplys & Linkage Function】Powered by the included USB cable or back-up battery (not included). Helps keep your home Secure even if the electricity fails. It can linkage with other smarthome products, such as PIR sensors or door sensors, etc.

Specifications:
Material: ABS
Color: White
Wireless Range: 45m
Sound intensity: 100 dB
Power supply: Mini USB , 5V-1A
Backup power supply: CR123A x 2 (Not included)
Wireless Type: 2.4GH, 1T1R
Protocol: IEEE 802.11b/g/n
Operating temperature: 0℃~ 40℃ (32°F~104°F)
Operating humidity: 20%~85%
Storage temperature: 0℃~ 60℃ (32°F~140°F)
Storage humidity: 0%~90%
Free app: Tuyasmart or Smart Life.
Support systems: Android and IOS.
Product size(D*W*H): 65 * 65 * 30mm / 2.6 * 2.6 * 1.2in
Weight: 100g / 3.5ounce
Package size: 100 * 100 * 60mm / 3.9 * 3.9 * 2.4in
Package weight: 115g / 4.1ounce

Package List:
1 x Siren Alarm (Battery Not Included)
1 x USB Cable