Extremely efficient absorption of all excess moisture. It is a good, convenient and economical solution for any room in any conditions! The Bison AIR MAX dehumidifier operates without a power connection, and when the room reaches the optimum humidity, it automatically "switches off". The BISON AIR MAX dehumidifier works thanks to a special composition of salt crystals, which, in contact with excess moisture, melts and is discharged into the tank in the form of salt water.