Suggested Retail: $62.16. FIRST ALERT CO400-3 Carbon Monoxide Detector Battery Operated White 3-Pack - This 3-pack of FIRST ALERT CO400 Carbon Monoxide Alarms uses electrochemical sensors to monitor for carbon monoxide threats. The battery-powered design doesn't require an electrician, just insert the included 9-volt battery and the detectors are ready. The advanced sensors detect CO leaks from multiple sources, with a loud 85-decibel alarm to alert you. Each detector has a button for silencing or testing the unit, and an end-of-life timer. The permanent sensor lasts up to five years and is powered by a replaceable 9V battery per alarm, ensuring protection even during power outages. Brand: FIRST ALERT Model: CO400-3 -- LOT STICKER: TCE-BOX-BOXTCED0056-ITEM-f9196e6f___LPNRRIF9365803 FIRST ALERT CO4003 Carbon Monoxide Detector, Battery Operated, White , 3Pack CO4003 -- SIZES ARE ESTIMATED. 7 CALENDAR DAY FULL REFUND GUARANTEE (FROM PRIMARY PICKUP DATE) ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. 7 CALENDAR DAY STORAGE (FROM PRIMARY PICKUP DATE) IS ALSO AVAILABLE. THE PRIMARY PICKUP DATE IS THE DAY AFTER THE AUCTION ENDS. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.