FIRST ALERT Carbon Monoxide Alarm, Detector With 9 Volt Battery & Two Silence Features – MAS-5027

  • 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 Include