instruction video, please check this link https://youtu.be/RoZE1SYAxHo 

48V 1000W brushless DC differential motor

Voltage(V): 48V
Output Power:1000W
Commutation: Brushless
Speed(RPM): 4800rpm
Rated current:15A

EFF%:83%

rated current: 18-35ah, max discharging time : 140mins      

High Speed : 20mph , Medium Speed:16mph , Low Speed:10mph ( under load 198lbs, and the weight of the bike is 154lbs)

Gear Ratio: 9.5:1     Torque:  2.62Nm

Package include 

1x 1000w motor with geaxbox

1x Speed controller

1x display

1x foot pedal

1x brushless wiring harness 

1x 3 speed switch

1x forward reverse switch 

1x power lock 

1x air switch

1x charger port 

1x teminal board

1x Brake switch