Kidde KN COB DP2 Plug In Carbon Monoxide Alarm with Battery Backup and Digital Display sesafety Brand AmzBoom Model ASIN oil only Brand AmzBoom Model ASIN B0DH5X7962 Configuration 3 pack (three portable units) Mounting Mounting brackets included Product type Portable fire extinguisher Agent type Not stated in title — verify on listing Agent weight Not stated in title — verify on listing Fire class rating Not stated in title — verify on listing Rechargeable Not stated — confirm rechargeable vs The Kidde KN COU B ultra sensitive CO monitor is a battery powered and the battery backup indicator ensures facilities teams know when the backup battery needs attention This dual power design makes the KN COB DP2 one of the most versatile CO alarms in the Kidde lineup: it operates on AC power under normal conditions