Digital counter volumetric

With a digital meter, you can control the rate of up to five filters.
The user can set the volume for each filter.
It counts from zero until the total is reached.
With a quick tap, you can easily check the remaining volume for each filter.
When the filter volume is reached, it generates an audible alert and flashes the filter number on the screen.
The two alkaline batteries last longer than two years. The status is automatically locked when the device is lost, it is designed primarily for residential and industrial water treatment.