Zoo Med's Precision Analog Gauges are of professional breeder quality, with many features not found in cheap imported gauges. Features include European-made precision German movement, side-venting to prevent against "fogging" inside the thermometer, and Velcro backing enabling you to remove the gauge for terrarium cleaning and maintenance. Extreme temperature range from 20F to 120F (-6C to 49C) for precise temperature monitoring. This is an offering for multi quantity bundle - 2 count