Connector: 6 pin male connector. Function: PAS Level/Speed/Trip/Background light/Battery indicator/Diagnostic code. 850C display are for TSDZ2 electric bicycle central mid motor. Ours display just for 8pin motor.For 500C, Ned a 1T2 cable to co Nnect, p lease check first! Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. 1 LCD 850C Color display.