Enjoy hours of invigorating mist with the TREVA Rechargeable Night Light Humidifier! With a portable, lightweight, leak-proof design, this whisper quiet humidifier can go anywhere. Perfect for small spaces like bedrooms, hotel rooms, dorm rooms and office space. Runs on included USB or rechargeable battery, no need for outlets or cords. Runs up to 7 hours on one charge. Built-in water sensor automatically turns off power when water falls below adequate supply. Humidifier has two mist modes: constant or intermittent. Optional night light feature has fade option. Measures 3.75 x 3.74 x 4.6 inches.