Retro-reflective sensor RL28-55-Z/47/82b/112 RL28-55-Z/47/82b/112 Ultra bright LEDs for power on, weak signal indication and switching state Programmable time function GAN, GAB, IAB and GAN-IAB as double function Not sensitive to ambient light, even with switched energy-saving lamps Waterproof, protection degree IP67 Protection class II