- Tamper resist feature unit goes into constant alarm mode if it has been unplugged or has come loose from the outlet
- 9V Battery backup provides continuous protection even during power outages
- Test/Reset button tests the unit for proper operation and resets the Carbon Monoxide alarm
- 7-Year end of life warning alerts user to replace CO alarm after 7-years of operation (40% longer than other CO alarms)
- Kidde?s carbon monoxide alarms meet the requirements of Underwriters Laboratories (UL), an independent facility that tests products for compliance with widely-accepted safety standards
The Nighthawk, AC Powered, Plug In Carbon Monoxide Alarm With Battery Back Up, Easy To Install, Provides Reliable Protection Against The Dangers Of Carbon Monoxide, Written Information & Instruction, Easy For Anyone To Understand, AC/DC Digital Alarm
List Price: $ 49.99
Source:
http://www.pluginalarm.com/2011/06/08/kidde-900-0235-nighthawk-carbon-monoxide-alarm-long-life-ac-powered-with-battery-backup/