The Exo Terra Digital Thermo-Hygrometer is a combination thermometer and hygrometer. This 2-in-1 precision instrument is equipped with a remote combined sensor for accurate temperature and humidity indication, and has a programmable minimum/maximum memory setting which can be controlled with a single button. Durable and easy to use, the Exo Terra Digital Thermo- Hygrometer can be installed with hook & loop fastener (included), or by simply sliding it into position on top of the Exo Terra Compact Top or Dual Top Canopy. Key Features : * Accurate temperature and humidity indication * Single button operated * Combined remote sensor for temperature and humidity * Minimum / Maximum memory * Fits the Exo Terra Compact Top and Linear Fluorescent Top Canopies.