Features: 【APP Remote Control & Voice Control】No matter how far away from home, warmth of home is in hands. Making your home smarter. Compatible with and for IFTTT for voice control. 【Siren with Temperature and Humidity Sensor 3IN1】APP sets temperature and humidity alarm in advance, detects changes in ambient temperature and humidity, exceeds safety interval, and automatically alarms even in absence of a network. 【100dB Loud Alarm & 18 Alarm Ringtones】When siren alarm triggered, it will make alarm with both 100dB voice prompts and quick flash strobe. 18 alarm sound ringtones optional, with colorful .Sound decibels can be adjusted from 0-90 decibels 【2.4GHz WiFi One-key Connect Easy Setup】Don't need home gateway, you can easily achieve intelligent control of home appliances, simple operation, easy to use. 【Dual Supply & Linkage Function】Powered by included USB cable or back-up battery (not included). Helps keep your even if electricity fails. It can linkage with other smart home products, such as PIR sensors or door sensors, etc. Specifications: Supply:Type-C, DC5V/1A Backup Supply: 2*CR123A(not included) Sound intensity: 100dB Wireless Standard: WIFI 2.4G 802.11 b/g/n Wireless : 45M Control Mode: Mobile APP "/SmartLife" App Support: Android/iOS Operating Temperature: 0℃ ~ 40℃(32°F ~ 104°F) Operating Humidity: 20% ~ 85%RH Item Size: Approx. 6.8 * 6.8 * 3.4cm (L*W*H) Item Weight: Approx. 65g / 2.3oz Package Information: Package Size: Approach. 9.7*8.7*5.2cm/3.8*3.43*2.05in Package Weight: Approach. 114g / 4oz Package List: 1 * Wireless Siren Alarm 1 * USB Cable 1 * User Manual (English) 1 * Set of Mounting Screws 1 * Sticker