The built in systems prevents dry burning while adapt to day / night use, making it an essential air care companion for homes and on the go lifestyles Ideal for dry climate residents, light sleepers, workers, and travelers seeking portable humidity relief through USB powered operations in compact spaces Perfectly sized for nightstands, work desks, or car cup holders, its 3.86x3.86x6 " design delivers safe, energy efficient humidification up to 8 hours per fill enhanced air with this 500ML USB humidifier, featuring adjustable mists output and a near quiet 25dB operations for undisturbed sleep and plant care in bedrooms or offices Equipped with color changing LED mood lighting and a soothing night light, this compact ABS humidifier touch control for both mists modes and automatic shut off when water is low