Replaces the alarm that was original to many RVs (model FG250RV).Hinged cover design allows for fast, easy installation and battery replacement. Silence feature lets you silence unwanted alarms. Test alarm with the same button. Tamper-resistant locking pin locks alarm to base to prevent removal of battery. Perfect if you rent your RV. Approved for use in recreational vehicles. 9-volt alkaline battery included. Mfr. 10 year limited warranty. | Replacement RV Smoke Alarm, White