Panasonic DC Digital Fiber Optic Amplifier with dual display, Polycarbonate housing material, NPN output, 600µs maximum response time, Switchable either Light-ON / Dark-ON, Red LED (632nm, modulated), 9mm wide, DIN-rail mountable, Incorporated Interference Prevention Function, Teach-in pushbutton, Short Circuit Protected, CN-14 or CN-24 cable sold separately