1.Function part material used high-grade PC. 2.Conductor used high quality brass and sliver contactor. 3.Ensure long-term life time of more than 40000 on and off. 4.Fluorescent point on the button 5.Easy installation and safe operation. 6.Super bullet proof pattern 7.Graceful calssical decoration style. 8.High temperature resistance. 9.High grade non-flammable PC plate.