YoLink Smart Wireless TemperatureHumidity Sensor, Wide Temp Range (-22 to 158 Degreefor Freezer, Fridge, Green House, Pet Cage Monitoring, Smartphone Alerts, Works w/ Alexa IFTTT -Hub Required.

“YoLink” is a proprietary wireless technology provided by YoSmart. which is based on the Semtechs LoRa wireless technology combined with the YoSmart smart home/buiding protocol, to provide the most advanced smart home/buidling devices solution. Compared to WIFI, Bluetooth, ZigBee, ZWave, and other smart home protocols, it has the advantages of lowpower consumption, longdistance coverage (wall penetration, and antiinterference. 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.