Home Slickdeals Google Nest Protect Smoke Alarm and Carbon Monoxide Detector, 2-pack – $159.99... Slickdeals Google Nest Protect Smoke Alarm and Carbon Monoxide Detector, 2-pack – $159.99 Costco By ARCOM - 7 October 2023 19 0 SHARE Facebook Twitter Go to the deal page: Google Nest Protect Smoke Alarm and Carbon Monoxide Detector, 2-pack – $159.99 Costco