Review on ETHMEAS Reptile Terrarium Digital Thermometer and Hygrometer - Indoor Outdoor Temperature Gauge and Humidity Monitor for Pet Keeping by David Boone

The product is easy to use and understand. You can select In and Outdoor (wherever you place the temperature and/or humidity sensors), C and F, Min/Max. Doesn't give you a permanent or 24 hour min/max value, although all you have to do is press and hold the min/max button to easily reset to the desired value. I give him 5 stars. The substrate is magnetized (held by a metal rod through 600D nylon mesh!) and can be wall mounted or placed vertically on a tabletop (with a small pull-out stand). The product turned out to be more functional than I thought.