Addressable Optical Fire Alarm Smoke Detector 2 Wire Smart System - China Smoke Detector, Addressable Smoke Detector | Made-in-China.com
First Alert 9120BFF Smoke Detector, Hardwired Alarm with Battery Backup, White, 1-Pack - Amazon.com
Smoke Detector, 3 Packs Photoelectric Smoke Alarm Fire Alarm with Light Sound Warning 9V Battery (Included) Powered Fire Safety for Home Hotel School etc - Amazon.com
BRK Photo/Ion Smoke Alarm Tamperproof 10 Year Sealed Battery SA3210
Google Nest Protect - Smoke Alarm - Smoke Detector and Carbon Monoxide Detector - Battery Operated , White - S3000BWES - Amazon.com
First Alert Smoke Alarm with Escape Light White 1039800 - Best Buy
The Best Smart Smoke Alarm | Reviews by Wirecutter
First Alert BRK SA511B Wireless Interconnect Battery Smoke Alarm with Voice Case of 12
Source Cheap Price Photoelectric Fire Alarm Sensor Smoke Detector on m.alibaba.com