Air Alert 90-Day Countdown Electronic Filter Change Reminder.  The perfect accessory for 1" pleated filters, or any filter that is replaced quarterly.

Don't forget to change your filter!  Great for "technically challenged" folks who don't get email.  When reset, this time counts down from 90 days.  The display shows you how many days are left until it's time for your filter change.

Features:

• Mini 90 day alarm clock with peel-off sticky pad which affixes onto your furnace, air handler, or other surface in your mechanical room
• 90 Day count down timer alarm
• Easy to set and use
• When due, alarms sounds 6 times then repeats every 10 seconds until stop pressed or reset
• LCD display
• Volume level approx 30-40db
• 1 x 'LR44' size battery included
• Unit Dimensions: diameter 40 X 17mm height