The Gentex WSSPK24 Colored Lens Series is an outdoor listed, wall mount speaker/ strobe that offers a quality speaker and visual alarm for warning and emergency notification. Applications include severe weather, evacuation, emergency response and many more. The WSSPK24 colored lens speaker/strobe offers a fixed 15/75 candela in lens colors of amber, blue, green and red. The WSSPK24 Colored Lens Series provides a 25 or 70.7 VRMs speaker with field selectable power taps of 1/8W, 1/4W, 1/2W, 1W, 2W or 4W. Included with the WSSPK24 Colored Lens Series speaker and speaker/strobe is the GBLP outdoor listed back box. Using the GBLP back box with the Series provides protection from weather related conditions and allows the necessary full candela output.The WSSPK24 Colored Lens Series are ANSI/UL 1480, ANSI/UL 1638 and CAN/ULC S526 and/or CAN/ULC S541 listed and warranted for 3 years from the date of purchase.Standard Features 24 VDC nominal voltage with a fixed 15/75 candela Shipped with GBLP outdoor listed back box Unit Dimension: 6.1" (15.494 cm) square x 4.06" (10.31 cm) deep Lens colors available: amber, blue, green and red Speaker voltage 25 or 70.7 VRMs standard, field selectable Field selectable power taps: 1/8W, 1/4W, 1/2W, 1W, 2W, 4W High quality dBA output (intelligible) Frequency range 400-4000Hz Screw terminals, separate in/out wiring (12-18 gauge) Synchronize with Gentex AVSM Control Module Tamperproof grill Faceplate available in red or off-white, wall mount.