Smoke Alarm, Ionization, 9V Price For: Each Visual Alert: Red LED Test Button: Yes Battery Backup: No Hush Button: No Operating Temp.: 40 Degrees to 100 Degrees F Features: Test Button, Intermittent Red LED Locking Pin: Yes Standards: UL, NFPA, Federal Housing Authority, Housing and Urban Development and California State Fire Marshal Guidelines Item: Smoke Alarm Diameter: 5" Height: 1-3/4" Manufacturers Warranty Length: 5 Year Limited Power Source: 9V Digital Readout: No Interconnection Capability: No Detection Method: Ionization Audible Alert: 85dB @ 10 ft., Horn Country of Origin (subject to change): China