... switch, 120sec timerUsage:Be sure the UV lamp and every part fix well before using it.1, Power on, press the on ... if you use the lamp with 120sec timer.3, It will stop when time’s up.4, Using 4*9w bulb, please ... replace the UV bulbs every 6 months, be sure to turn lamp off before replacing ... manual, don’t shorten or use over time. nail uv lamp