Package Include 

1 x Motor

1 x Controller

1 x LCD Throttle Grips w. power indicator and key lock switch

1 x 3 Speed switch

1 x T8F Chain 116 Links

1x T8F 54T 29mm Sprocket

Model: 48V DC 1800W Brushless Motor

Sproket: T8F 9Teeth

Rated current: 28A

Max Current： 40A

No-load current: ≤3.0A

Rated torque: ≥3.5-10N.m

Max power: 1800w-2000w

Motor weight: 10.5 lbs (4.8kg)

Rated rotating speed: 4300-4500RPM

Controller Spec.:

Rated voltage: DC 48v

Current limit: 32A

Rated power: 1800w

Matching motor: DC Brushless motor

Under Voltage Protection: 42V

Wires

Battery :Thick Black (Power Negative) /Thick Red (Power Positive)
Motor :Thick Yellow (Motor Negative) /Thick Blue (Motor Positive)
Ignition Switch :Thin Red(VCC)/Thin Blue
Indicator : Thin red (Indicator power output) /thin black (indicator negative)
Brake :thin yellow (Brake signal)/thin black(Negative Power)
Speed governor :Thin blue(Speed handlebar Signal input) /Thin black (Negtive Power) /thin red(5V Positive Power)
Charge Port : Thin red (charge input power Positive) /thin black (Power negative)
Brake Light: Thin red (power Positive) /thin black (Power negative)

Why choose Brushless motor? What is the advantages of brushless motor :

1. Less electrical and electromagnetic noise

2. Long lifespan: No brushes to wear out, around triple lifespan as brushed motor

3. Low maintenance: No brushes to replace

4. Powerfrugal: Power consumption is 1/3 of brushed motor

5. High efficiency: Brushless motors are typically 85-90% efficient whereas brushed DC motors are around 75-80% efficient.