YoLink Smart Wireless Temperature & Humidity Sensor, Wide Temp Range (-22 to 158 Degree) for Freezer, Fridge, Green House, Pet Cage Monitoring, Smartphone Alerts, Works w/Alexa IFTTT -Hub Required
Brand: YoLink

“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/buiding protocol, to provide the most advanced smart home/buidling 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.

World's Longest Wireless Range - Powered by LoRa technology, the long-range yet low-power system offers the industry’s longest receiving range in the market (1/4 mile). Our long-range coverage enables its use in areas challenging for most residential Wi-Fi systems, such as basements, outdoor porch/patio areas, sheds, free-standing garages, even remote outbuildings on your property.
Environment Monitoring – Be informed of the current temperature and humidity of critical equipment and rooms, as well as receive instant notifications of changes based on your personalized criteria. Current temperature and humidity is displayed on the YoLink app, along with historical graphs, so you can monitor current and past temperature and humidity conditions. Receive email and smartphone banner alerts per your individual settings whenever a pre-set value is reached.
Low-Power Means Longer Battery Life - Because of the low power consumption, device batteries may last 2 years or more (depending on application and device usage/activity), on standard AAA Alkaline batteries (lithium batteries not required)!
YoLink Hub Required but not included - YoLink Hub is the only central controller for YoLink devices, and it connects YoLink devices to the internet and the cloud. Without YoLink Hub, this sensor does not work with the YoLink app and does not support 3rd-party integration with Alexa and IFTTT. YoLink Hub is not included, please search B07TQLKQLJ for the hub or try our Temp Humidity Sensor 2 Pack Kit with 1 Hub B08JP39RLP
Team Me Up! – Pair your sensor with a YoLink Siren Alarm for immediate attention-getting alarms. Team your sensor up with one or more YoLink Smart Plugs, to do such things as turn on a dehumidifier upon high-humidity levels, or turn a bathroom exhaust fan on upon high temperature or humidity. Utilize the app’s user-friendly automation functions to create automatic actions per your specific needs. （Products sold separately!）