Automatic sensor will automatically start when hands get into the machine. *LCD display screen start to record timing that you cured. *Sunshine nails comfortable eye contact.relieve burning sensation. *Low heat mode relieves you from pain when curing gels *Double light source(365+405nm)LED lights to cure UV gels/builder. *36Pcs strategically placed LED lights. *10s,30s, 60s ,99s timer ,