36V/48V 350W Electric Bicycle Brushless Motor Speed Controller,, Vgeby. GOOD HEAT DISSIPATION: The controller shell is made of aluminium alloy with groove design, which can protect the inner circuit due to good heat dissipation feature to avoid thermal overloading. SENSITIVE SPEED CONTROL: This item is a brushless motor controller, it can provide steady speed and sensitive control of braking and direction changes. LOW MALFUNCTION: The wires and interfaces are durable, and ensure low malfunction of long time use. EASY INSTALLATION: The interfaces have instruction labels on them for your easy installation. Suitable for electric bicycles, scooter, etc. GUARANTEE: If you are not satisfied with our product received, you can apply for unconditional return and refund within 180 days. In terms of any problem of this product, you can send emails to us at any time. We will reply you as soon.