Features1Heat Dissipation: The controller shell is made of high quality metal with groove design. Due to its good heat dissipation function, it can protect the internal circuit and avoid thermal overload. 2LCD Display: LCD display can clearly show the state and data, backlight enables you to see screen clearly in dim environment, buttons for quick operation, easy to use. 3Display Date: When riding a bicycle, the product will display a lot of useful data on your bicycle, such as remaining battery, current speed, average speed, maximum speed, clock, total one way distance. 4Package: The electric bicycle lithium battery conversion kit includes 22A ordinary controller + S900 display instrument + 130X thumb throttle + D12 power pedal assist sensor. 5Application: This electric bicycle brushless motor controller is easy to install and use, suitable for retrofitting electric bicycles with 36V 48V 500W motors.SpecificationItem Type: Electric Bicycle Controller KitMaterial: Aluminum Alloy + PlasticWeight: Approx. 778g/27.4ozController Box Size: Approx. 120x53x33mm/4.7x2.1x1.3inDisplay Size: Approx. 110x60mm/4.3x2.4inPower: 500WCurrent: 22AFunction description of display instrument:1. Display function: speed display, power assisted gear display, power indicator, fault prompt, total mileage, single mileage, headlight display, single driving time display.Package List1 x Controller1 x S900 Display1 x S900DisplayManual1 x 130X Thumb Throttle1 x D12PowerPedal Assist Sensor Line1 x D12PowerPedal Assist SensorChip1 x D12PowerPedal Assist SensorRing2 x Cable Tie1 x Controller Wiring Manual