This Brand New electric motor controller with Sine wave, Square wave, No hall, three modes compatible.

What are three modes?
* First mode: Sine Wave Status - Motor without noise,Very quiet ! 
If one of motor hall sensor is broken, controller still can work in Sine Wave Status.

* Second mode: Square wave Status - Motor with a little noise, < 60db, speed is about 8% faster than Sine Wave Status.
If two of motor hall sensors are broken, controller can work in Square Wave Status.

* Third mode: No hall Status - Motor with a little noise, < 60db, speed is about 8% faster than Sine Wave Status.
If all of three hall sensors are broken, controller can work in No hall Status.

If your motor's hall sensors are broken, don't need to replace hall sensors. Just use this controller that can recover your motor to work.

If you don't know how to match motor wires to controller. 
Just plug two blues together, controller into learning status and looking for correct working way. After 1-2 seconds, it can find correct working way,then disconnect these two blue wires' plugs. From now on,it always works with this kind of correct way.          

48V / 52V Electric Bicycle Brushless Motor Controller For E-bike, Scooter & Motorcycle -- 18-MOSFET
It's fit to drive 48V / 52V 1500W ~ 1800W brushless with hall sensor hub motor.

Features:
Suitable for Electric for electric bike, scooter & motorcycle
Rated Voltage: DC 48 / 52Volts 
Casing material: aluminium
Maximum Current: 40 A ± 1 Amps
Thermal: aluminum shell and the substrate - Black color

3 phase 120° brushless motor
Operating Conditions: -20~45 °C
Waterproof design
Size: 155 mm L × 72 mm W × 38 mm H
Weight: 0.7 kg

Working with LCD screen
Display: speed, mileage, battery gauge...
 
Functions:
Mute when start
Speed limit
Power cut brake
Blockage protection  
Current limit protection
E-ABS brake
Short circuit protection
Avoid out of control
1:1 pedal assist function
Undervoltage protection

Additional features:
* Auto Cruise - Hold on throttle for 8 seconds that can turn on cruise, re-turn throttle or press brake lever to turn off cruise.
* Reverse
* Speeds ( 0 - 5 ) - "0" is off. "1" is the slowest. "5" is the fastest.
* Mph / kmh
* ....