The Kidde 2030-DCR Carbon Monoxide CO Alarm Detector is a reliable and essential home security device that operates on battery power. Manufactured in the United Kingdom, this white alarm detector features an electrochemical carbon monoxide sensor and operates with a loud 90 dB sound rating. With a diameter of 9.6 cm and weighing 138 g, this model includes two batteries for continuous protection. Perfect for ensuring safety in any home, this carbon monoxide detector from Kidde is a trusted choice for peace of mind.