LED Flashing Combination Audible/Visual Signal, 120VAC, Blue - Available in 24VDC and 120VAC. 50,000 hour LED light source. Surface mount, integrated 1/2-inch NPT pipe mount and 4-inch electrical box mount. Five lamp/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). PLC compatible. Type 3R enclosure. UL and cUL Listed.