Battery operated - 9v; Low battery, peak level and fault warnings. Audible and visual alarms. Test/reset button. Wall-mounted and freestanding. Digital display 10-99ppm. Size: H9 x W12 x D3.5cm
CommentsGood points: Alarm triggered within three minutes and noise level was over 85db during testing. Compact and discreet alarm that can be wall-mounted or freestanding. The display is clear and easy to read. It records the peak level of CO reached over the past four weeks useful if you are away on holiday. Thorough instructions.