Specification:Item Type: Electric Bike Conversion Kit Material: Aluminum Alloy + ABS plasticController Box Size: Approx. 82x53x31mm / 3.2x2.1x1.2inInstrument Size: Approx. 77x50mm / 3.0x2.0inController 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: Fully Waterproof Connector1 to 2 Wire Description: One End Connected to the Controller, the Other Two Ends Connected to the Instrument and Finger DialController wire definition:1. Red, black single wire: power wire 2. Single large black wire (9pin): motor wire3. Single black wire (9pin): 1 To 2 wire4. Single black wire (3pin): PAS power sensor wireLCD6 meter function description: up button, on/off button, down button, one way time, total travel time, ride speed (metric), ride speed (imperial), maximum speed, average speed, PAS marker, CADENCE display, distance (metric), distance (imperial), travel distance, total distance, battery voltage, backlight and headlight, brake display, cruising function display, PAS start display, open throttle, 6KM/H thrust assist system, motor temperature (°F/°C), motor power, ambient temperature (°F/°C)How to Use:Description of the controller: The wire colour definition interface on the controller can be connected to the socket of the accessory to achieve the function, the specific operation can refer to the wiring diagram and the manual. Package List:1 x Controller 1 x Instrument1 x Instrument Mounting Bracket4 x Gauge Mounting Bracket Washers2 x Instrument Mounting Bracket Screws1 x Instrument Manual1 x Throttle Pointer 1 x Sensor 1 x Controller Wiring Instructions 1 x One Two Connection