The Kidde Nighthawk KN-COB-B-LP is a battery-operated carbon monoxide alarm powered by 3 AA batteries (included). It features dual LED indicators: red illuminates when in alarm mode, green indicates DC power is present and normal operation. A Test/Reset button verifies circuit operation and immediately silences alarms. Backed by a 10-year limited warranty for units manufactured in 2013 or later.
What is the Nighthawk brand?
Nighthawk is Kidde's legacy CO alarm sub-brand, known for reliable electrochemical CO detection. Nighthawk products were among the most widely deployed residential CO alarms. The brand is being phased out in favor of current Kidde product lines, but many Nighthawk units remain in service.
When should I replace the KN-COB-B-LP?
Carbon monoxide alarms should be replaced after 10 years of service per manufacturer recommendations and NFPA 72 guidelines. Check the manufacture date on the back of the alarm. If it is more than 10 years old, replace it with a current model.
# Kidde Nighthawk Battery Operated Carbon Monoxide Alarm **Model:** `KN-COB-B-LP` **Brand:** Kidde **Category:** Co Alarm Battery > The Kidde Nighthawk KN-COB-B-LP is a battery-operated carbon monoxide alarm powered by 3 AA batteries (included). It features dual LED indicators: red illuminates when in alarm mode, green indicates DC power is present and normal operation. A Test/Reset button verifies circuit operation and immediately silences alarms. Backed by a 10-year limited warranty for units manufactured in 2013 or later. ## Specifications | Attribute | Value | |---|---| | Product Type | Carbon Monoxide Alarm | | Alarm Type | co | | Sensor Co | electrochemical | | Power Source | battery-aa | | Battery Backup | No | | Battery Type | AA | | Battery Count | 3 | | Battery Replaceable | Yes | | Voice Alerts | No | | Smart Wifi | No | | App Connected | No | | Digital Display | No | | Low Level Co Alert | No | | Explosive Gas Detection | No | | Indoor Air Quality | No | | Peak Level Memory | No | | Hush Feature | Yes | | Interconnect | No | | Interconnect Type | none | | Alarm Db | 85 | | Ul Co | UL 2034 | | Warranty Years | 10 | ## What's Included - alarm unit - 3 AA batteries - mounting hardware Source: https://www.jaspecs.com/kidde/co-alarm-battery/kn-cob-b-lp-kidde-nighthawk-battery-co-alarm/