USB Programming Cable for BBS01 BBS02 BBS03 BBSHD Mid Drive Motor Kit Electric Bicycle Motor 1. The USB programming cable allows connection of a PC and the 8fun Bafang BBS01/BBS02/BBSHD mid drive motor. 2. Not only it will not defect your throttle performance, but also it can be helpful to the battery and motor life. 3. In PAS levels 1-9 you can use full throttle acceleration to get rid of the maximum speed limitation (max speed only applies to PAS). 4. Use the usb programming cabel, you will NOT "fry" your motor by making changes to the basic user level controller parameters. 5. Most of the customer who bought the Bafang BBS01B BBS02B motors will buy this usb cable to make their E-bikes more in line with their riding habits. Electric bike kit in order to change the basic user level controller parameters, this does not allow for changing of the firmware and is safe for you to perform. You will NOT "fry" your motor by making changes to these parameters. The changes have been made based on customer requests to improve the following complaints: make the throttle act as a throttle should instead of like an on/off switch, reduce current draw from 25 amps to 18 amps without impacting performance to increase battery and motor life, enable full throttle in PAS levels 1-9, throttle over ride of max set speed limit (max speed only applies to PAS)