Bests & Worsts Reviews from Amazon

Very disappointed to discover "digital" display does not display a running CO level, 0 or otherwise. It only displays a digital value if the unit is tested or if an actual CO alert is sounded. This stinks since I specifically purchased the unit to display a running value for my garage. Advertised "digital displays" does not emphatically state continual display, but there is that implication. Won't buy again. **Addendum...unit packaging states..."Digital Display, Clearly Illuminates hazard levels." This is hedging by the manufacturer. It should have added to the above phrase..."...with user intervention." I.e., the buyer will NOT "clearly see the hazard levels" unless he/she presses the display button. Otherwise, the display is BLANK! Very poor marketing.