- The Motor Controller (sometimes called an ESC - Electronic Speed Control), lives inside the vertical tube in an ES4. It is the main brain of an ES4, and syncs the battery, controls, and motor. If you have a generic issue with an ES4, a new motor controller will most likely fix it.
- Original Ninebot OEM product
- Brand new in the box, never used
- Programmed with Version 1.6.4
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