... employees,15000 square meter factory Product DescriptionAD22(LED)series of indicator is equally used LED shining chip as light source with ... , C, D, E, G, H, double color lamp, position indicator, shining buzzer and mini short indicator, as well as design shape of AD22 ... . (2)Insulated resistance≥ 2MΩ (3)Voltage wave allowed by AC indicator± 20% (4)Continual working life≥ 30000h (5)Brightness≥ 60CD/m2 ...