The TREVA rechargeable night light humidifier is perfect for small spaces like bedrooms, hotel rooms, dorm rooms and office space. Optional night light feature has fade option. Humidifier has two mist modes: constant or intermittent. Powered by a rechargeable battery, no need for outlets or cords. This humidifier can go anywhere! Runs up to 7 hours on one charge. Built-in water sensor automatically turns off power when water falls below adequate supply.