Ac/ dc operated carbon monoxide (co) alarm Vst-c598ih Carbon monoxide (co) alarm vst-c598ih features and benefits * ac/dc operated carbon monoxide alarm * non-radioactive technology for environmental friendly * co concentration threshold: Varying time-to-alarm depending on concentration * with quick fix mounting bracket for easy installation and simple ac connector for easy installation * fitting and battery tamper resist feature * inter-connectable up to 40 co, heat and/or smoke alarms * 3 color led indicator (fault and alarm and ac power indicator) * low-battery and battery missing warning indicator * hush/test button * auto-reset when co clears * ce approved, comply with en50291-1:2010
