The Hispec HSA/BC/10 Battery Operated Carbon Monoxide Alarm is fully interconnectable with the HiSpec smoke and heat alarms. This CO Alarm is easy to install & is supplied with wall plugs & screws. · · · Powered by a sealed Lithium Battery with 10 year life · · Self diagnostic CO technology · · Reset feature · · Low battery warning · · Power/alarm indicator · · Simple combined test / silence button on the face of the alarm · · Automatically carries out self test on sensor and self diagnostics · · Will sound a low battery warning when alarm is nearing end of life · · Suitable for wall mounting or free standing installation · · Meets the requirements of the 2022 England, Wales & Scotland legislations for carbon monoxide alarms in homes