BRK Electronics First Alert SCO2B6CP 9V Alkaline Battery Operated Ionization Smoke Alarm and Carbon Monoxide Combo Alarm - Contractor 6-Pack

9V battery powered smoke and CO combo alarm in a convenient bulk contractor 6-pack. Electrochemical Carbon Monoxide Sensor - the most accurate sensor available as compared to other sensing technologies Single button test/silence 9V Alkaline Battery Powered Two Latching features: Alarm Latch to easily identify initiating alarm after alarm condition has subsided. Low battery latch: to visually identify which unit is in low battery condition. Two Silence Features: Alarm Silence to temporarily silence nuisance alarms. Low Battery Silence to silence low battery chirp for up to 8 hours. Intelligent Sensing TechnologyTM helps reduce the number of nuisance alarms Perfect Mount - allows for easy alignment of alarm Dust Cover Includes mounting anchors and screws. End of Life Signal provides audible notification alarms needs to be replaced 10-Years Limited Warranty Model # SCO2B6CP Weight (1 unit) 7.6 oz Dimension (1 unit) 5.6" dia x 2.0"H Operating Voltage 9V alkaline battery Temperature Range 40°F (4°C) to 100°F (38°C) Humidity Range 10% to 95% relative humidity (RH) Audio Alarm 85dB at 10 feet Test/Silence Electronically simulates smoke condition or carbon monoxide condition, causing the unit to alarm. Press and hold test/silence button Alarm Reset Automatic when smoke and/or CO clears Smoke/CO Sensor Dual chamber ionization/Electrochemical Indicator Lights/Sounds DC Power: Intermittent Green LED Local Alarm: Red LED flashes rapidly Alarm Latch: Red LED flashes 2 sec on/2 sec off after local alarm stops Low Battery Latch: Green LED flashes on for 2 seconds, off for 2 seconds. Note: Latching features are active for 15 minutes only. Listing Listed to UL217 and UL2034 Standards