Smart Wireless Temperature / Humidity Sensor Wide Range (-22 to 158 degrees) for Freezer Fridge Monitoring Pet Cage/Tank Monitoring Smartphone Alerts; Works with Alexa IFTTT; 2 Pack - Hub Included

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)! 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 / Smart Mini-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!) Plug; Plug & Play! Plug Hub into an outlet; plug Hub into your router; scan in new devices; and enjoy your new system; in minutes! Your Hub is the only device that connects to the Internet; and a wired or WiFi connection is required (wired required for easy & fast Plug; Plug & Play; and most reliable and secure connection). WiFi connection set-up difficulty varies and requires changing settings to your network and/or your phone Changes to your network; passcodes; etc; require changes in the app.