MarCELL PRO - Professional Level Remote Temperature, Humidity & Power Monitor - No WiFi Needed (Uses AT&T Network) - RV, Network Room, Freezer, Home - Instant Phone Call Alerts - Made in The USA

This is great peace of mind while traveling in an RV with pets.

I am very emotional as I write this review. Charlie and the other representative worked with me for a very long time and were so patient. The first unit did not work. We went through everything. They were absolutely amazing. Their help was personalized, kind, friendly, everything you could hope for. It was determined the unit should be switched for another one. It was perfect. After finishing all of my testing, only a few days passed, and then today arrived… I rushed home as fast as I could and because of their customer service and truly, truly caring, and sticking with me, my cats are alive. If they had given up on me, my babies would be gone. One has very long fur and special health needs. He has to be cool. Please see the photo attached. This is inside of an RV sitting on a concrete slab in the Texas sun. Outside it was 97°. Thank you, thank you. And my Libby and Jackson are alright. Two lives were saved.

We have been using the Marcell for our ten day trip with pets. It has been accurate for temperature, sends alert promptly when out of range for temperature. It operated on a battery for over 24 hours successfully. The cons include 1) it must be plugged in to electric to initially operate, even with a full battery. Unhandy when you need to monitor car temp and unit is off. 2) when an alert is sent, ie: “temp out of range”, you do not get a corresponding text saying temperature returned within normal range. I don’t want to waste an instant update to check the status. Not completely satisfied nor dissatisfied enough to return it but not what I thought. In today’s world, technology here is lacking.

The MarCELL is a great buy if you need to monitor property from anywhere. I have had one false alarm ever, but I'd rather have a false one now and again than none ever. I have a house in New England I need to keep an eye on from Florida in the winter, and this does a great job of that.On the downside the web interface is pretty old school and kinda kludge-y compared to what most of us are used to in 2019, but that's nitpicking - It does what it is supposed to do reliably and once you have set it up, you are good to go.

Temperature readings seem to be inaccurate (but, at least they are consistently inaccurate), two units 50' apart reading 10°F different, neither one reflects the temperature readings or settings on building thermostats.Monitoring prices are more than I would pay, but the client is ok with the price.Monitor pricing is per unit, not per account...just so you know.Otherwise, they work as advertised. Setup was simple and straightforward.Notification options are more than satisfactory.