The Water Savior Dual Flush Regulator kit helps you to save water and money by giving you the
two button flush handle (below):

The Silver push button for FULL flush,
The Blue push button for HALF flush.

The Water Savior allows dual flush action - press blue button for less water to flush liquids, press silver button for more water to flush solids

The half flush uses .75 gallons of water and is less than half of the water you currently flush right now (1.6 gallons).
The full flush uses 1.5 gallons of water is more than enough to clear the toilet of solid matter, but less water than you currently use.

The kit includes everything you need to upgrade your toilet to Dual Flush. All parts install in the tank.