We started producing big power scooters in 2004, and improved our 1500W motor from "brush" to "brushless. " Our third generation 2000W and then 3000W/4000w came out in 2006 and 2007 respectively. and The 4000W brushless hub motor with advanced digital controller achieves 95% efficiency and more powerful torque (120Nm) and has a range of 120 km (75 mi. ) at the top speed of 90km / h (55 mph) . Front and rear disc brakes and 13" wheels are standard. And, our scooters are hot sellers in Europe, Asia and the USA.