Large Display Timer AIR FILTER BOXES ” –Ed RosenthalZero Tolerance contains

” –Ed RosenthalZero Tolerance contains only natural food-grade ingredientsOMRI certified for organic useMade with food grade essential oils100% vegan

The stability indicator and HOLD function lets the user know when to take readings and freezes the reading on display for easy and accurate recording

Prep the new filter

magnet-mounted

Large Display Timer AIR FILTER BOXES ” –Ed RosenthalZero Tolerance containsFeatures the largest display available on a timer: 3 x 2 1 2". Can be easily read from across a room. Simultaneously displays either one count up channel and a clock, or two count down channels. All channels have a range of 24 hours with 1 second resolution. Also indicates how much time has elapsed after a count down alarm sounds and conveniently recalls the last timer setting for reuse. White case has extra large start stop button and a loud alarm.