The FireAngel Smoke & Carbon Monoxide Alarm Set is a brand new 2026 model that utilizes a photoelectric smoke sensor and electrochemical carbon monoxide sensor for reliable detection. This alarm set includes a 9V battery and 2 AA batteries for operation, with a powerline/UPB smart home protocol for added convenience. With an operating sound rating of 85 dB and a sleek white design, this alarm set is an essential addition to any home for enhanced safety and security.