Hardwired Interconnected Combination Smoke and Carbon Monoxide Detecto — CHIMIYA
Kidde Hardwired Smoke & Carbon Monoxide Detector, AA Battery Backup, Interconnectable, LED Warning Light Indicators - Amazon.com
Kidde P4010ACSC 120V AC 3-in-1 LED Strobe and 10-Year Combo Smoke / CO Alarm
Siterlink Hardwired Interconnected Smoke Detector Carbon Monoxide Detector Combo, 2 in 1 Smoke and CO Detector with 2 AA Batteries Back Up, AC Smoke and CO Alarm, Voice Alert, Self-Check, 1 Pack - Amazon.com
SITERWELL Hardwired Interconnected Smoke Detector Carbon Monoxide Detector Combo with 2 AA Batteries Back Up, 2
Kidde i12010S Kidde I12010SCO AC Hardwired Smoke Alarm – Lighting Supply Guy
USI Hardwired Carbon Monoxide Bundle, Includes 1 CO & Gas Alarm + 1 Combo Alarm