Specification: Item Type: Electric Bicycle Controller S800 Instrument Kit Color: As Pictures Shown Material: Aluminum Alloy + ABS Plastic Weight: Approx.566g/20.0oz Controller Box Size: Approx. 111x53x33mm/4.4x2.1x1.3in, Meter Size: Approx. 74x46mm/2.9x1.8in Controller Rated Voltage: DC 36V/48V Controller Maximum Current: 22A Controller Speed Setting: 1-4.2V Controller Brake Input: Low Level Booster: 1:5 Applicable Motor Power: 500W Controller Wire Color Definition: 1. Yellow, Green, Blue Single Big Head Line: Motor Phase Line 2. Red-white-black-blue-green-yellow Double Row Six-wire Port: Motor Hall Wire 3. Red and Black Single Big Head Line: Power Line 4. Red, Blue, Black, Green and Yellow Single-row Five-wire Port: Instrument Line (5pin) 5. Black and Yellow Lines (two): Power off Brake Handle Line 6. Red and Black White Lines: Throttle Dial Line (3pin) 7. Brown, Black and Yellow Wire: Power Sensor Wire (3pin) 8. Black and Red Lines (two): Headlight Lines Description of M3 Instrument Line End: 1. Line Color Definition (5pin): Red: Meter Power Cord Blue: Power Control Wire of the Controller Black: Instrument Ground Wire Green: the Data Receiving Line of the Meter Yellow: the Data Transmission Line of the Meter 2. Expand Headlight Function: Brown Wire (headlight Positive), White Wire (headlight Negative) Package List: 1 x Controller 1 x Instrument 1 x Thumb Throttle 1 x Speed Assist Sensor 1 x Controller Wiring Manual