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

I was reluctant to buy these, or any product similar, but because of the affordable price and the need I purchased them. I own a restaurant with 4 large freezers, sometimes an employee would leave a door open or not completely close it. These have allowed us to get warnings, at the temperatures we choose, so we don’t lose product. We receive notification on our phones from anywhere if a freezers temp goes too high. Was super easy to set up, after plugging in the hub to out router (I hope those are the right computer words) I just had to scan QR codes and we were up and running. Comes with an app that makes it easy to monitor the freezers and set them up with our needs/warning temps. After I had the first two monitors up and running I ordered two more. One in the same room as the other two freezers, in the same room as the hub, and other for the kitchen freezer two rooms away. All are working wonderfully!

Great product that actually works for freezer in garage. Impressed with product and YoLink

We have one in each freezer and our refrigerator. The app works great, very user friendly. The hub has a good distance for the sensors. We have our freezers in a separate building behind our house and it reaches no problem. The peace of mind being able to check your freezers while on the road is worth it.

First, setup was very easy. After calibrating all of the sensors (I have 7 total) I put one in each room and one outside. I can now check the temperature in each room from anywhere. Theres only two issues Ive had so far. 1) after setting up the hub, it downloaded a couple hundred GB of data from the internet. I checked the firmware for all of the sensors and the hub but they were all up to date. Id like to know what all that data was for. 2) it works with Alexa... as long as you only want to know the temperature. It doesnt show the humidity and you cant use it as a trigger to turn on the dehumidifier when the basement humidity gets to 45% or to turn on the fan when the room gets to 74°F, for example.

This alert literally saved a huge supply of frozen breastmilk within the first few days of using the alert. Coincidental timing but I am beyond thankful!

Using these in my Samsung refrigerator/freezer, and what a wealth of information. now I can see when it goes into defrost mode, how often it does, and even how much of a temperature drop occurs in order to make ice. excellent devices for monitoring fridge and freezers. Will be ordering more devices for other needs. New fan here.

Easy to install. Alert works.

My immediate need was an alarm for a garage freezer, which is an older freezer and I had become aware that if we have a breakdown issue, could lose several dollars of food products. Simple audio alarms were not an option because of the distance of the de-attached garage from the house. Plus there are days when I do not even go out to the garage to hear an audio alarm. And I was concerned about relying on wi-fi shown on other systems. I was suspect about the quality from my router wi-fi signal to the garage and a sensor inside the freezer and then back to smartphone. The YoSmart and the Lora tech works extremely well, as advertised. I have a sensing unit in my garage freezer and get alerts on my email (text and Alexa are also options ) when the temp goes in/out of the range that I have set. As a new user I needed the YoSmart Hub as well and the package I ordered came with the Hub and two temp/humidity sensors. The second sensor is used in our inhouse frig. Since these worked so well, I have purchased a motion sensor and attached inside mailbox to alert to when postman opens and closes door, to alert me with an email when I have mail. And I purchased a third temp/humidity sensor and I am using it in the attic to monitor temperature and humidity. We have an automatic attic fan that comes on & off with a mechanical setting of temp and humidity. With the YoSmart sensor in the attic, I will be able to see the range of conditions in the attic as the weather changes. And with those changes I will then make setting adjustments on the automatic attic fan. In our area of the world, weather is full extremes in all Seasons and I believe the additional information provided by the sensor will help me make better adjustments on the fan and in turn keep the attic temp & humidity under control. Set up on the Hub and the sensors is a snap and instructions are very clear. Since the Hub is connected to the Internet, sensors can be monitored outside the home, via smartphone. Very pleased with this product - looking for other applications in and around our home.

Works good. Easy install

Our Toddler turned our deep freezer off, and we didnt know because it was still plugged in and the light was on. But we lost alot of food and so we purchased these for both our deep freezers. They work great and I love it syncs up to our phones and we can monitor everything on there.