Continuous protection against elevated levels of CO for 10 years.NOTE: Cannot ship to AK, HI, PR, or Catalina.\Features\ - Sealed lithium battery\ - Electrochemical sensor\ - Self-activating\ - 85 dB at 10'\ - 4 1/2"L x 2 3/4"H x 1 1/2"D\ - 5 oz\ - 10-year warranty \ - 1/Each Model Number: C3010|UOM: EA