KIDDE Carbon Monoxide Detector Kidde Carbon Monoxide Alarms are a vital precaution for the Caravan & Motorhome environment. They are easy to install, providing reliable protection by detecting the dangers of deadly carbon monoxide levels in your Caravan or Motorhome. Easy operation and multiple mounting for added convenience.Test - reset button tests the alarm circuit and allows you to immediately silence the alarm. Two LED's indicating detection and operation of the alarm. Warning chirp sound when battery needs replacing. Approved by BSI and fully certified. Sold in singles or Outer Boxes x 3.