Increases humidity levels to up to 100% RH Simulates low clouds, fog, or early morning dew Automatically shuts off when water level drops below minimum Ideal for use with the Exo Terra Thermostat & Hygrostat Easy to install and replenish water The Exo Terra® Humidifier generates a cool fog through ultrasonic oscillations which simulates low hanging clouds and fog in tropical terrariums or early morning dew in desert terrariums. This Humidifier with adjustable fog output control is powerful enough to increase the humidity of multiple terrariums up to 100% RH. Created to be installed outside of the terrarium, its slim design allows it to fit in any Terrarium Cabinet. Equipped with a 120cm / 48” durable, flexible hose and multiple fittings, the Humidifier is suitable for various terrarium types and powerful enough to split the hose to humidify 2 terrariums (or more, by using the optional Humidifier Extension Kit). The Humidifier has a LED indicator that lights up green when there’s enough water in the reservoir, flashes redgreen when the water-level is low, and red when the reservoir is empty. The Humidifier automatically shuts off when water level drops below minimum and restarts once water is replenished.