Strobe Combination Audible/Visual Signal, 24VDC, Amber - Available in 24VDC and 120VAC. Surface mount, integrated 1/2-inch NPT pipe mount and 4-inch electrical box mount. Five lens colors: Amber, Blue, Clear, Green and Red. Twist-off lens for easy access. Internal buzzer produces 85 dBA at 10 feet (95 dBA at 1m). Conformal coated PCB. Type 3R enclosure. CSA Certified. UL and cUL Listed.