Specification:Item Type: Electric Bike Conversion KitMaterial: Aluminum Alloy, ABS PlasticProduct Size: Approx.Controller Box 82 x 53 x 31mm / 3.2 x 2.1 x 1.2 (Manual Measurement Allowable Error)Controller 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 To 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 WireLCD4 Meter Function Description:On/Off Button, Up Button, Down Button, Battery Level Indicator, Throttle Marker, 6km/h Thrust Assist, Brake Marker, cruising Marker, Travel Distance, Total Distance, Backlight And Headlights, Pas Marker, Maximum Speed, Ride Speed (Metric), Battery Voltage, Distance (Metric).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 User Manual1 x Throttle Dial1 Assist Sensor1 x Controller Wiring User Manual1 x One To Two Connecting LineNote:Note that the retrofit kit must be a fully waterproof kit