Digital Thermometer/Hygrometer.
Digital Thermometer/Hygrometer. at HorticultureSource.com -
Digital LCD Minimum, Maximum thermometer and humidity device. Allows you to reset minimum and maximum settings. Large letters for easy reading. Comes with 1 AA battery. This is not a controller. Displays the readings only. Very nice! Almost 4 1/2 height x 4 length almost 1 inch depth (thickness) screen is 2 1/2 x 3 inches.