YoLink Smart Wireless Temperature/Humidity Sensor Wide Range for Fridge Monitoring Pet Cage/Tank Monitoring App Alerts Text/SMS Email Alerts Works with Alexa IFTTT 2 Pack - Hub Included

YoLink Technology ""YoLink"" is a proprietary wireless technology provided by YoSmart. which is based on the Semtech's LoRa wireless technology combined with the YoSmart smart home/building protocol to provide the most advanced smart home/building devices solution. Compared to WIFI Bluetooth ZigBee Z-Wave and other smart home protocols it has the advantages of low-power consumption long-distance coverage (wall penetration) and anti-interference. It is the first smart building/home protocol that can be very easily setup and is a very low cost but creates a reliable robust and more secure IoT network. Requirements: Smartphone or tablet running iOS 9 or higher Android 4.4 or higher Specification: YoLink Hub Power: In-wall power adapter Input: 5V DC Maximum Current: 1A Working Temperature: -20°C~50°C (-4°F~104°F) Humidity: 0~90% non-condensing YoLink Temperature & Humidity Sensor Voltage: 3V DC (2 - AAA batteries) Al