* Automatically switch on when you put in your hand and turned off when your hand is out.* Built in timer with 3 preset time controls (30s, 60s, 90s).* Auto Sensor, efficiently dry your gel nails, and no causing any overheat.* Double light source, 12 LED beads in position, make your nail gel cure faster and more convenient.* It not only cures the gel of the fingernail, but also cures the gel of the toenails.