Notifier by Honeywell NP-100R REMOTE TEST SMOKE DETECTOR. For Duct Applications, use with System Sensor DNR or DNRW Duct Smoke Detector Housing. For use with Notifier's FireWarden and Spartan Series Addressable Fire Alarm Control Panels. Can be used with Standard 6 B210LP Mounting Base. B501 Standard 4 European flangeless mounting base.B200SR Intelligent sounder base capable of producing sound output with ANSI Temporal 3 or continuous tone. Replaces B501BH series bases in retrofit applications. B224RB Plug-in System Sensor relay base. B224BI Plug-in System Sensor isolator detector base. Let me know if you have any questions. Please check out my other listings for more fire alarm parts including smoke detectors heat detectors duct detectors keys and more! Including system sensor and Notifier! This item is in the category "Business & Industrial\Facility Maintenance & Safety\Fire Protection Equipment\Smoke Detectors". The seller is "treasure_finds_59" and is located in this country: US. This item can be shipped to United States.