... exporting best price and efficient services Certified by CE,CCC,ROHS,UL,TUV,ISO9001 AD22(LED)series of indicator is equally used ... ,E,G,H,double color lamp, position indicator,shining buzzer and mini short indicator,as well as design shape of AD22-22G ... .(2)Insulated resistance≥2MΩ(3)Voltage wave allowed by AC indicator±20%(4)Continual working life≥30000h(5)Brightness≥60cd/m2 ...