Visonic MCT-442 Wireless Carbon Monoxide Detectors feature loud built-in alarm buzzer and five years life time.

Features:

• Gives early warning of carbon monoxide (CO) poisoning danger, providing visual and audial alarm indications when CO is detected
• Loud built-in alarm buzzer (95db) and a large flashing LED alarm
• Battery operated, ensuring continuous protection; low battery and sensor end of life indications
• Five years life with end of life notification
• Continuous auto-testing and manual testing
• Tamper protection