Product review (5 stars): Great monitor system for RV
These work as advertised! I use them around my RV when we are on the road, and at home when not traveling. While in the RV, I monitor the freezer, the water bay, outside temperature, and the inside temperature, including humidity. It DOES require a lot of AA batteries, however they last about 6 months! Even the sensor in the fridge. Alarms may be set to alert you to freezing temperatures, or what ever temperature you set. It also records the high and low temperature for the day. Easy to read. I highly recommend!