Electric Motor Controller by Kellycontroller

Avoid dealing with this manufacturer and seller of electric motor controllers (on-line registration in USA & China) if at all possible . . . their support documentation is, largely, unusable to native English language users and, when approached for further assistance via explanatory after-sales support, there was no engineering support available. When the item was subsequently returned, they refused to refund us for the full loss (including return postage and other peripherals purchased) incurred!