Here is another electric skateboard that gives you smooth rides. The KKA S1 board has an electric 500W double motor, Magnesium alloy frame, 8.8Ah battery, and max speed of 28 km/h. It also has a max range of 40 km. The electric board also comes with Bluetooth control.
The KKA S1 has a small turning radius. It has front and rear lights to give you a safer ride. Expected to ship in March. You can catch the project on Kickstarter.