Specification:Item Type: Lithium Battery Modification KitsMaterial: Aluminum Alloy + ABSSize:Controller Box: Approx. 82 x 53 x 31mm/3.2 x 2.1 x 1.2inMeter: Approx. 95 x 65mm/3.7 x 2.6inController Rated Voltage: DC 36V/48VController Rated Current: 7AController Maximum Current: 15±1AController Speed Setting: 1-4.2VController Brake Input: Low LevelController Low Voltage Protection: DC 30/40±0.5VApplicable Brushless Motor Power: 250W, 350WConnector Type: Full Waterproof Connector1 for 2 Line Description: One End is Connected to the Controller, the Other End is Connected to the Meter and DialController Line Definition:1. Red, Black Single Wire: Power Wire2. Black Single Large Wire (9pin): Motor Wire3. Black Single Wire (9pin): 1 to 2 Wires4. Black Single Wire (3pin): Pas Power Sensor WireLCD3 Display Instrument Function Description: Up Button, Switch Button, Down Button, Battery Capacity Indication, Backlight and Headlights, Brake Display, One Way Time, Total Travel Time, Battery Display, Motor Celsius Temperature, Motor Fahrenheit Temperature, Ambient Celsius Temperature, Ambient Fahrenheit, 6km/h Thrust Assist, Cycling Speed (Metric), Cycling Speed (Imperial), Maximum Speed, Average Speed, Distance (Metric), Distance (Imperial), Cycling Distance, Total Distance, Battery Voltage, Pas Flag Function.How to Use:Controller description: The wire color definition interface on the controller can be connected to the socket of the accessory to realize the function. For the specific operation, please refer to the wiring diagram and manual.Package List:1 x Controller1 x Meter1 x Instrument Mounting Bracket4 x Instrument Mounting Bracket Gasket2 x Instrument Mounting Bracket Screws1 x Instrument Manual1 x Throttle Dial1 Assist Sensor1 x Controller Wiring Manual1 x 1 for 2 Connecting LineNote:1.