Copenhagen Wheel.

https://www.superpedestrian.com/
https://www.youtube.com/watch?v=S10GMfG2NMY

This is the first commercial version of the Copenhagen Wheel. Now
available for sale.
Own a limited edition, hand-crafted Copenhagen Wheel, invented and
built in Cambridge, MA.

The Copenhagen wheel Technical specifications:
MOTOR US: 350W / EU: 250W
WEELE SIZE 26" or 700c rim
BATTERY Removable 48Volt Lithium
CONNECTIVITY Bluetooth 4.0
BATTERY LIFE 1000 cycles
SMARTPHONE OS iOS, Android
CHARGE TIME 4 hours
COMPATIBILITY Single Speed or 9/10 Speed Free Hub (email us your bike
specs if you have doubts: info@superpedestrian.com )
TOP SPEED US: 20 mph
EU: 25 km/h
BRAKE TYPE Rim brake and regenerative braking (downhill and back-pedal)
RANGE Up to 50 km / 31 mi
WEIGHT 5.9 kg / 13 lbs
DROPOUT 135 mm