New, New in package, model KN-COPP-B-L Features •Digital Display - Displays the level of carbon monoxide the unit is sensing. The unit updates this reading every 15 seconds. •Peak Level Button - Displays the peak CO level recorded since its last reset or power up. •Battery Operated (3AA's included) -Provides protection during power outage. •Two LEDs: Red illuminates when in alarm mode. Green- DC power is present, normal operation. •Test/Reset Button -Tests CO alarm circuit operation and allows you to immediately silence the alarm. •End of Life Alarm - Alerts user to replace CO alarm after 10-years of operation. Make an offer!;