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