Kidde Nighthawk Carbon Monoxide Detector, AC-Plug-In with Battery Backup, Digital Display, Pack of 2
The Kidde Carbon Monoxide Detector, AC Plug-In with Battery Backup, Digital Display, Pack of 2 (model KN-COPP-3) features sophisticated sensor technology to help protect you and your family from the dangers of carbon monoxide. Operating with an AC plug-in, the CO detector can be easily installed directly in any AC wall outlet, or on a shelf or table with the included 6' power cord. It also has a 9V battery backup, which allows the carbon monoxide detector to provide continuous protection from CO gas, even during power outages. A red dot will appear in the lower right corner of the carbon monoxide alarm to indicate that the CO detector is operating normally. When the CO alarm detects carbon monoxide gas, 4 quick beeps will sound, followed by 5 seconds of silence, then the beeps will repeat; a number reading will appear on the digital display that measures the CO concentration. These CO levels will be stored in the detector's memory until it is reset. The digital display also provides a low battery warning by sounding 1 alarm per minute and displaying "Lb" on the screen. For whole-home detection, place one carbon monoxide detector on each level of your home and one near every sleeping area. The Kidde AC plug-in carbon monoxide detector with battery backup is UL Certified with a 10-year limited warranty. Meets requirements of UL 2034.

Kidde Battery Operated Carbon Monoxide Alarm with Digital Display
The Kidde Carbon Monoxide Detector with Battery Backup, Digital Display & LED Lights, model 900-0146-LP, features an electrochemical sensing technology to protect you & your family from the dangers of carbon monoxide. Operating on 3-AA alkaline batteries, the CO detector provides continuous protection from carbon monoxide, even during power outages. The CO monitor provides 2 LED lights: a green LED will flash once every 30 seconds to indicate the alarm is operating properly when batteries are installed, a red LED will pulse 4 short beeps to indicate CO gas has been detected until the device is reset or the gas is eliminated. For whole home family protection, place 1 carbon monoxide detector on each level of your home & in your bedroom. UL Certified with a 10-year limited warranty.
Kidde KN-COPP-B-LPM Battery-Operated Carbon Monoxide Alarm w/ Digital Display - Digital screen with large display is easy to read - Peak-level memory displays the highest CO concentration measured since the last reset - Meets the all UL requirements - Battery operated with three AA batteries included - Backed by a five-year warranty
The new Kidde KN-COPP--LPM carbon monoxide alarm is the only battery-operated alarm that includes a digital display feature. This key feature adds an advanced level of protection that you have come to expect in a Kidde manufactured product. The battery operated CO alarm includes multiple mounting options, allowing installation on a wall or tabletop. This alarm has been carefully designed and tested to detect CO concentration in a residential environment. It provides continuous monitoring of CO levels, even during power outages when many CO incidents occur. The digital display feature allows for easy viewing of carbon monoxide levels from 30-999 PPM (parts per million). The KN-COPP-LPM will also detect and store concentration CO levels as low as 11 and up to 999 PPM with its peak level memory display. This alarm includes a snap-on cover that gives immediate access to the batteries and a safety feature that makes it difficult to close the cover without the batteries being installed. Updates digital reading every 15 seconds, allowing you to see if levels change. The peak level memory displays the highest CO concentration measured since the last reset. The test/reset button tests CO alarm circuit operation and allows you to immediately silence the alarm. A low battery signal alerts users when the batteries need to be replaced. Includes informative LEDs: green LED for normal operation, red LED for alarm. The alarm alerts user to replace CO alarm after 7 years of operation. Sensor: Electrochemical.