Quick-readying digital Hygrometer & Thermometer. Independent remot probes: Measure heat & humidity at different locations! Battery included - Ready to use. Two 39 (one meter) long independent probes and sensores allow for monitoring of heat and humidity at different locations. Use in terrariums, incubators or other pet animal applications. Waterproof temperature probe can be used in air or submerged in water. (Humidity probe not waterproof, do not submerge in water.) One LR44 1.5v batter and mounting suction cups included.Why We Love It:Independent remot probes: Measure heat & humidity at different locationsUse in terrariums, incubators or other pet animal applicationsWaterproof temperature probe can be used in air or submerged in waterAbout Zoo MedHere at Zoo Med, animals are our passion, and for over 40 years we have made it our mission to supply the very best in exotic pet foods, reptile products, and reptile habitats. As a company made up of reptile hobbyists, we strive to provide the supplies and knowledge needed to successfully care for reptiles, amphibians, fish, insects and other exotic pets to keep them happy and healthy.