Now comes with USB drive with instructions and videos, nad purtest kit to test hardness and iron levels. Eliminate the hard water that causes scale build up and reduces soap efficiency with our complete whole house water softening unit with high efficiency Fleck 5600SXT Digital "On-Demand" control valve. 1.5 cu.ft. High Capacity Resin - High capacity extra long life resin in all of our softening systems. Removes Hard Water - Using ion exchange process this system removes the calcium and magnesium that cause hard water. By eliminating hard water you extend the life of your plumbing and appliances. Meter Based Regeneration - This system uses a meter based regeneration process. This means that the water you use is measured and the system only regenerates when it needs to. If water needs increase the system regenerates more often to keep up. Fleck 5600SXT Digital Control - The SXT controller is the newest controller from Fleck and is built on the tried and true 5600 valve. These valve have been tested to run continuously up to 27 years. In addition, the SXT controller offers some great features, including a backlit LCD display, touch pad controls, 48 hour internal power backup, and a user friendly interface. - Durable tank. The standard square brine tank included with this system is approximately 15"x17"x33" and can hold about 250 lbs. of pelleted salt. The included safety float prevents overfilling and the overflow drain acts as an additional backup to avoid water messes. Note: Design and color may vary from the picture. DIY Installation - Installation only takes 1-2 hours with some basic plumbing skills. New, full warranty and support