Description：

 Brushless Motor Controller X008-AB0121 48V 18A Suitable for electric bicycles, mountain bikes, electric scooters, etc.

Important Notice:

1. This product uses the 5S protocol. If the controller protocol does not match, it may cause error codes
to appear on the display!

2. Please contact our customer service
before purchasing a controller. Send us photos of your original controller's
label and connector. We will ship after confirming the controller model.

3. After placing your order, please monitor
your email closely. We will send an order confirmation within 12 hours.

4. Respond to our order confirmation email
promptly. Failure to do so will be interpreted as your agreement that the order
is correct and acceptance of our no-return policy.

Q&A

Q: Why do I
need to provide a photo of the controller label?

A: Since many buyers are unfamiliar with
controllers, we need to verify the correct product purchase based on the
original controller label photo. This prevents wasted time and money for
buyers.

Q: Can I use
your controller if my model differs from yours?

A: Different controller models use
different communication protocols. Replacement is possible only if the
communication protocols match. Typically, e-bike controllers consist of
connectors for the power supply, motor Hall sensor wires, brakes, throttle grip,
pedal assist sensor, bike headlight, and motor. As long as you can modify the
controller connectors (we can assist with this modification), our controller
can replace your original one.

Q: How do I
find my controller model if I don't know it?

A: Send photos of the controller label and
display screen serial number to our online customer service. We'll identify
your controller model and recommend a suitable replacement.

Q: Do you
accept returns if the controller is incompatible?

A: If you communicated with us before
purchase, we accept returns and refunds. If you did not contact us before or
after purchase and did not respond to our emails, we assume the controller
model you purchased is correct and you accept our no-return policy