Beware KQI
I purchased a NIU KQI Air electric scooter and have had nothing but problems since day one. Within less than a month the control panel displayed an Error 7 while I was riding, leaving me stranded on my way to work. The power button works intermittently and the ride modes do not function at all.
I contacted NIU support and formally requested a return under their own published return policy, which covers defective products. They declined, sent the scooter back to me after repairs without my consent, and then stopped responding to my emails entirely. I have since initiated a chargeback with my credit card company and am returning the scooter to sender.
The product is poorly made and the customer service is worse. If you are considering a NIU scooter, I would strongly encourage you to look elsewhere.