1.Small size and unique design, cover small space, movable base designed with five wheels and easy to be take away. 2.With 6 led lights in the main frame, blue light, tunable bleaching time with microprocessor-controlled timer presets. 3.High efficiency goose pipe design, adjust angle at random, convenient for use. 4.Smart auto-select power, from 100 to 240 Volts AC.50/60 Hz for global use. 5.Whiten time can be adjust from 1-30minutes,normally preset 15minutes for one time,2-3times as one treatment.