First Alert Onelink Wireless Interconnect Carbon Monoxide Detector with Voice Alarm-CO511B at The Home Depot
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First Alert

Model # CO511B

Onelink Wireless Interconnect Carbon Monoxide Detector with Voice Alarm

First Alert Onelink Wireless Interconnect Carbon Monoxide Detector with Voice Alarm

This item has been discontinued.
The Home Depot no longer carries this specific product.

$59.99 / each
Item cannot be shipped to the following state(s): AK,GU,HI,PR,VI


In Stock



Model # CO511B

Internet # 203658772

Wireless Carbon Monoxide Alarm detects carbon monoxide and has a voice alarm that's proven to wake children up better than standard alarms. It also has a horn tone with low frequencies for the hearing impaired and elderly. This alarm will sound if it detects carbon monoxide even during power outage. It uses a secure radio frequency to communicate between alarms, which is perfect for linking alarms on different floors or in stairwells. No wires necessary and it's programmable with up to eleven locations. Other features include a test and silence button, a latching indicator that remembers which unit initiated the alarm. The CO511B can be connected to other Onelink alarms and offers 360-degree access to the CO sensor. If one unit triggers an alarm, all carbon monoxide alarms in the series will sound. The CO511B features a perfect mount system for perfect alignment, a low battery latch and (2) silence features. The Wireless Carbon Monoxide Alarm is warranted to the original purchaser for a period of 7-years. First Alert invests time and research into providing dependable and hardworking products. Committed to innovation and value, First Alert improves safety in and around the house.

  • Interconnects with other alarms without wires
  • One button silence and test
  • Onlink alarms by First Alert feature a wireless connection so when one alarm is triggered, all alarms sound
  • Exclusive voice warning with location in addition to horn
  • Operates on 2 AA batteries
  • Comes with a 7-year limited warranty


Alarm Type  Carbon Monoxide  Alarm/Detector Features  Voice Alert 
Assembled Depth (in.)  5.13 in  Assembled Height (in.)  5.13 in 
Assembled Width (in.)  2.38 in  Battery Back-Up  No 
Certifications and Listings  No Certifications or Listings  Commercial / Residential  Residential 
Connector/Contact Type  None  Digital Display  No 
Electrical Product Type  Carbon Monoxide Detector  Included  Batteries 
Returnable  90-Day  Voltage (volts)  1.5 



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If product is eligible for shipping to AK, HI and US Territories additional transit time and remote surcharges may apply.