Type:Shift SensorOrigin:Mainland China USB Programming Cable Lengh:50 cm USB Programming Cable: Function: 1. Change throttle level 2. Change PAS speed level 3. Change current and voltage limit of motor Advantage: You can set motor to suit your riding habits, you can change the motor parameters at any time to adapt to different road conitions. Disadvantage: May reduce the motor's life if motor's starting current and current limit are changed to larger at long time. How it works: 1. Download a software from a card inside the parcel 2. USB Cable one side connect with PC another side connect with bafang mid motor, instead of display and keep the motor power on. Gear Sensor: Function: It will cut off motor power transitorily when bike shift gears. It can help you riding e-bike motor smoothly and protect chains. Gear sensor can connect with BBS01B, BBS02B, BBSHD motor which has 3 pin female gear sensor port. For other motor, use 1T2 to split a 3 pin female connector from 1T4 cable connect the gear sensor. Install on the bike: Pass the gear line through the gear sensor Brake Sensor: Brake sensor can help you keep your original oil brake or mechanical brake system. 1T2 Cable: 5 PIN Display Extension Cable: 1T4 EB-BUS Cable: