Single Phase Is Useful For Motors Of All Hp. Supports Two Button Starters (Green And Red). This Device Is Useful For An Overhead Tank. The Device Will Automatically Start The Motor Pump When The Water In The Upper Tank Is Empty. When The Water In The Upper Tank Is Completely Filled, The Device Will Automatically Stop The Pump. The Motor Pump Will Switch On And Off Depending On The Water Level In The Upper Tank. The Upper Tank Water Status Will Be Visible From The Indicator On The Device. The Facility To Switch The Motor Pump From Automatic Mode To Manual Mode Is Available. There Will Be A One-Year Warranty, And It Is Very Easy To Install.