1、Heat 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. 2、LCD 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. 3、Display 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. 4、Package: The electric bicycle lithium battery conversion kit includes 22A ordinary controller + S900 display instrument + 130X thumb throttle + D12 power pedal assist sensor. 5、Application: This electric bicycle brushless motor controller is easy to install and use, suitable for retrofitting electric bicycles with 36V 48V 500W motors. Item Type: Electric Bicycle Controller Kit Material: Aluminum Alloy + Plastic Weight: Approx. 778g/27.4oz Controller Box Size: Approx. 120x53x33mm/4.7x2.1x1.3in Display Size: Approx. 110x60mm/4.3x2.4in Power: 500W Current: 22A Function 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. 1 x Controller 1 x S900 Display 1 x S900 Display Manual 1 x 130X Thumb Throttle 1 x D12 Power Pedal Assist Sensor Line 1 x D12 Power Pedal Assist Sensor Chip 1 x D12 Power Pedal Assist Sensor Ring 2 x Cable Tie 1 x Controller Wiring Manual