Xenon strobe light source with hornFlash rate 60 fpm100 dB at 1 meter/ 90 dB at 10 ft (measured in anechoic chamber)Low current drawTerminals for easy wiringGray, engineered thermoplastic housingDiode Polarized for use in electrically supervised circuits (869DSTR)Versions suitable for indoor and outdoor applicationsOperating indoor temperature range:" 85% relative humidity at 85F (30C), 32F to 120F (0 to 49C) variable ambient temperatureOperating outdoor temperature range:" 95% relative humidity at 86F (30C), -31F to 150F (-35C to 66C) variable ambient temperatureEdwards 860 Series xenon beacons with horns are bright, low current, high decibel, combination signals designed for use where a distinctive visual or audible signal is required." The housing is made of gray, engineered thermoplastic." The strobe and horn can be operated independently. The 867STR (indoor) and 868STR (outdoor) Series can be surface mounted on the supplied surface box." The 869STR and 869DSTR Series beacons can be flush mounted." They are designed to mount in a standard 4" (102mm) square electrical box with extension ring (total min. depth of 3" (75mm) not supplied.) The 869DSTR Series is Diode Polarized for use in electrically supervised circuits.