X-Sense Smart Smoke Detector Carbon Monoxide Detector Combo with Replaceable Battery, Wi-Fi Smoke and Carbon Monoxide Detector with Cost-Free App Notifications, SC07-WX, 3-Pack - Amazon.com
X-Sense 10-Year Battery Smoke and Carbon Monoxide Detector with LCD Display, Dual Sensor Smoke and CO Alarm Complies with UL 217 & UL 2034 Standards, Auto-Check, SC08, 5-Pack - Amazon.com
X-Sense SC07 Ionization Smoke and Carbon Monoxide Detector with 10-Year Battery
X-Sense 10-Year Battery Combination Smoke Carbon Monoxide Alarm Detector with Large LCD Display, SC07, 1-Pack - Walmart.com