Flashed, fully tested, and updated to the latest version of stock firmware, these OEM speed controllers are plug-and-play ready for your scooter. Unlike cheaper clone models, these OEM boards use quality MOSFETs to drive your motor making them significantly more durable. 
 
Features:
-Fully functional GUARANTEED
-OEM qualify MOSFETS
-Water resisant (conformal coating or silicone potting) 
-Plug-and-play activiation (with a flashed dashboard) 
-Ninebot ES4 serial number (latest, most powerful stock firmware)
-Proper length motor wires (clones have short wires) 
 
Disabled External Battery:
If you don't plan on using an external battery, get a controler with a disabled external battery connector for $30 off!