Honeywell W8600A1007

The AirWatch indicator can be mounted in the home near the thermostat to conveniently remind you when your air cleaner, UV air treatment system and humidifier need maintenance. Four liquid crystals display arrowheads that at the needed time indicate what air-quality equipment needs cleaning or filter replacement. Arrow blinks when service is needed. Includes battery indicator.

Dimensions: 3 3/4H x 2 1/2W x 1 3/4D