Allen Bradley 855E-B10SA3 Bulletin 855E 50mm Control Tower Sound Module Stack Light, 115V AC Full Voltage, Black Housing, Single Circuit Piezo; Steady and Flashing Status Indicator Light Modules Top-mounted terminal blocks on all bases UL Type 4/4X/13, IP65 on all bases, lights and caps sound modules Incandescent, socket-mount LED, or strobe Surface, vertical, and magnetic mount No-tools assembly and maintenance, "Twist-off" lenses for easy lamp changes, topmounted terminal block for easy base wiring