Silver effect designer CO alarm to fit in the modern home., Provides early warning of the presence of low or high levels of CO in your home through alarm & LCD display, The digital LCD display shows low levels of CO down to 10ppm & also peak readings over the previous 4 weeks, Internal power pack will power alarm for 7 years in normal operating conditions, Easy to install, Integrated digital thermometer. Switchable between temperature & CO modes, Kitemark certified to quality standard BS EN 50291-2001, The display can be switched between CO monitor & the integrated digital thermometer