Mains with battery back up. Low battery and fault warning light. Peak level button. Audible and visual alarms. Test/reset button. Can be used as a direct plug-in, a wall mounted or a tabletop unit. Cord length 2.05m. Size: H14 x W9 x D4cm.
CommentsGood points: Alarm triggered within three minutes and noise level was over 85db during testing.In case of a power cut the 9v battery will continue operating the alarm for at least 20 hours. Thorough instructions. Drawbacks: No display. Quite bulky. Should only be used as a plug-in unit if the socket is around shoulder level. Complicated system of beeps and lights to inform you of presence of CO, fault or low battery.