HIGHEST QUALITY, most accurate electrochemical co sensor technology CONVENIENT, end of life chirping signal HELPFUL, 2 silence features that silence both alarm and low-battery chirp FEATURES, 9-Volt Battery and all necessary mounting hardware Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety Electrochemical CO Sensor is the most accurate technology available Two Silence Features Silence Low Battery Chirp For up to 8 Hours End of Life Signal Tamper Resistant Locking Pin Locks Alarm Cover to Prevent Removal of Battery 9V Battery Included
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