Press the on-off button for 2 seconds can switch its power from 36W to 22W.<br />3 time setting: 30 seconds、 60 seconds or 90 seconds.<br />This kind of LED light source covers a wider range of ultraviolet band、 suitable for drying nail UV-glue、 builder gule、 nail polish gel、 sculpture gel、 gem glue and LED nail gel. No need to worry about distinguishing your nail gel<br />Comparing with ultraviolet light、 it is closer to white light、 which ensures the corlor of nail gel. Its light has no harm to nails、 eyes and your skin、 protecting your hands from being black.<br />Heat radiation hole and fan design can cool the machine continuously for 30 seconds、 protecting the machine from overheated.