The DreamStation Humidifier is an ideal CPAP therapy device. Compatible with DreamStation Auto CPAP Machines with Heated Humidifier, Pro, and BiPAP (Auto) and (Set Pressure) Machines with Humidifier, it features Dry Box Technology to protect against electronic damage, heated tubing, and three distinct heating modes - Standard, Adaptive, and Preheat. Adaptive Mode adjusts heat levels per environmental humidity, Preheat Mode is designed to heat the humidifier for 30 minutes prior to therapy, and Fixed Mode offers constant heat from the heated plate.