• Early warning of carbon monoxide (CO) poisoning danger
• Visual and Audible alarm indications upon CO detection
• Built-in 95db Alarm Buzzer and large flashing LED alarm
• Visible and transmitted low battery indication
• Fully certified by the most strict and demanding international standards for safety products in Europe (LPCB UK, EN 50291) and USA (UL 2075)
• Auto-test and manual test buttons included
• Long battery life (4 years with typical use)