First Alert Smoke and Carbon Monoxide Alarm SCO500B

Smoke & Carbon Monoxide Combination Alarm. One alarm protects ONELINK® against two deadly household threats. Enabled. Alarm automatically communicates with other ONELINK® enabled alarms when installed. Exclusive Voice Warning with Location will tell you the preprogrammed location of the initiating unit and danger detected. Programmable up to 11 locations (ex. "basement"). When alarms sounds, if programmed for basement it will say "Warning, evacuate, smoke in basement" along with all other installed ONELINK® Voice alarms. Spread Spectrum Horn Tone. Lower and varying horn frequency makes it easier for elderly with normal age related hearing loss to hear horn. Sweeps through the 2200 – 3400 Hz range. RF Interconnect. Reliable and secure radio frequency communication between alarms. 915 MHz frequency with 65,000 security codes and 3 channel frequency hopping.Single Button Test/Silence eliminates confusion. Depending on what mode the alarm is in, pushing the button provides different functions such as testing the alarm, silencing the alarm, re-testing the alarm when in silence and clearing the Latching features. Two Silence Features. Temporarily silence low battery chirp for up to eight hours before replacing low battery or silence an unwanted alarm for several minutes. Two Latching Features. Alarm Latch: Easily identifies initiating alarm even after alarm condition has subsided. Low Battery Latch: Identifies which unit is in low battery condition. Perfect Mount System includes a gasketless base for easy installation and a mounting bracket that keeps the alarm secure over a wide rotation range to allow for perfect alignment. 6 Year End of Life Timer. Every 24 hours of operation a counter stored in memory is updated. When the count equals 6 years of true operation, meaning actually powered-up, a malfunction chirp (triple chirp) will sound once a minute at the time of the 45 second Power-LED flash.