Feature 1Good Heat Dissipation: The controller shell is made of high quality metal with grooves designed to protect the internal circuitry from thermal overload due to good heat dissipation. 2Multifunctional LCD8H Display: The LCD8H display instrument has a variety of functions, allowing you to more easily view the data on the panel; when riding a bicycle, the product will display many useful data on your bicycle. 3Display Useful Data: Such as battery display, backlight display, headlight display, brake display, temperature, one way time, total travel time, current speed, average speed, maximum speed, total one way distance, 6km/h thrust assist. 4Controller Specification: Controller box size is 81x52x30mm / 3.2x2.0x1.2in, controller rated voltage is DC 36V/48V, controller rated current is 7A, controller maximum current is 151A, controller speed setting is 14.2V, controller brake input is low level, controller low voltage protection is DC 30/400.5V. 5Product Packaging Lists: The bicycle lithium battery conversion kit includes 15A ordinary square wave controller (motor waterproof head) + LCD8H instrument + 130X finger throttle + 8C booster combination kit, which is suitable for bicycle lithium battery conversion with 36V/48V 250W brushless motor.Item Type: Bicycle Lithium Battery Modification Controller KitMaterial: Aluminum Alloy + PlasticController Box Size: Approx. 81x52x30mm / 3.2x2.0x1.2inController Type: Square Wave ControllerController Connector Type: Waterproof Connector (Except Motor Waterproof Connector)Controller Rated Voltage: DC 36V/48VController Rated Current: 7AController Maximum Current: 151AController Speed Setting: 1-4.2VController Brake Input: Low LevelController Low Voltage Protection: DC 30/400.5VApplicable Motor Power: 250WColor: As Pictures ShownWeight: Approx. 596g / 21.0ozInstrument Function Description: Up button, switch button, down button, powerassistedsensor sign, battery capacity indicator, power display, running sign, one way time, total travel time, battery voltage, brake display, 6km/h thrust assist, riding speed ( Metric system), maximum speed, average speed, travel distance, total distance, backlight and headlights, ambient temperature in Celsius, and ambient Fahrenheit. .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Controller1 x LCD8H Instrument1 x Instrument Bracket4 x Bracket Gasket2 x Bracket Screw1 x Instrument Manual1 x Finger Throttle1 x 8C Booster1 x Controller Wiring ManualNote1. Pay attention to match with motor power.2. Please allow 13mm error due to manual measurement. Thanks for your understanding.