Siterlink Hardwired Interconnected Smoke Detector Carbon Monoxide Detector Combo, 2 in 1 Smoke and CO Detector with 2 AA Batteri

Hardwired or Wireless Interconnect - These smoke and carbon monoxide detectors can be hardwired or wirelessly connected to up to 12, and when one alarm goes off, all alarms go off, notifying everyone of an emergency 2-in-1 Protection - This combination detector protects against smoke and carbon monoxide This combination alarm is equipped with dual sensors to detect smoke and cO hazards in a single unit One-Button control- Simply press the Testmute Button on One of the units to test or mute the entire interconnect system, which is more convenient and saves time Hardwired Alarm with Replaceable Battery Backup - keeps you and your family safe even during power outages Detect potential hazards anywhere in the home for total monitoring and security 85 dB Alarm & Self check Function - This smoke detector and cO combination detector has self check function instead of manual test When the probe fails, it will notify you as soon as possible A loud alarm of 85 decibels will wake even the deepest sleeper