1,KT controller just only compatible with KT display(same communication protocol) . Please make sure that your system is KT system.Waterproof connector is special that I can't promise you it can 100% compatible(because of the line sequance).But most can use it if you check carefully. Please check your motor cable if it is Julet or Higo 9pin waterproof plug(there is some letters on the connector ).Julet is better.But for 250W 350W500w.Higo is also OK.

2, Please contact me if you are not sure which is right for you or have further questions by Ebikpro message.

Controller dimension

about 8 * 5.2 * 3.1  cm

weight: 250g

cable length :all about 10-13cm 

6 better mosfets (make this controller appearance as small as 14A )

Maximum current: 17±1A

Rated voltage:DC36V/48V

Speed set:1-4.2V

Rated current:8A 

Brake input :Low-Level

Low voltage protection: DC30/40±0.5V

motor (9pin waterproof plug )           power (red-black plug)

1T4 cable plug(8pin waterproof plug-Throttle-Display-Ebrake*2)     

PAS (Yellow-3pin waterproof plug)

First of all, make sure that the outlet of your motor is waterproof nine cores,and motor is

brushless hub motor ,then we can configure our accessories series.