36 Volt Controller (3 Pin Throttle Plug) - Model YK428 - Version 1

Version 1 Controller for the 36 Volt TrailMaker, TrailClimber, X-Cursion, Malibu and Newport Elite Max Electric Bicycle.   

If you have a 5 Pin Throttle Plug Model HZ323 or JN183, you will need a Version 2.  Search SKU 36VMTN-220-2.