The ELK-SL1R is a weather resistant strobe light designed for easy attachment to ELK’s stainless steel speaker and siren units. An optional wall kit (ELK-WK1) allows the strobe to be mounted to a wall or to single or double gang electrical boxes. The attractive SL1 features simple 12 Volts DC two-wire hookup, low current draw, and compatibility with virtually all 12 volt control panels (including pulsing alarm outputs). The ELK-SL1 is molded from virtually indestructible polycarbonate, such as Lexan, and is available in clear, amber, blue, and red. Features: Indoor / Outdoor Durable Polycarbonate Easy to Install: Simple 2 Wire Hookup Works with pulsing alarm outputs Whats Included: Strobe FiberWasher Hex Socket Cap Type 3 Screw 3/16” Short Arm Hex Key Blanking Plug 2 Gel Filled B-Connectors Instructions