SwallowBot Upgrade Service for Segway miniPRO and Ninebot S (compatibl - M4M
Lightweight Left and Right Firmware Durable for Ninebot ES1 ES2 ES3 ES4 Plastic Fasteners Replacement Parts Handlebar Firmware Kit Scooter Accessories - Walmart.com
My results with custom firmware "SPORT" preset Segway ES4 : r/ninebot
How to install Stock firmware on Ninebot-Segway ES1/ES2/ES3/ES4