Feature：BMW M1 M2 steering wheel buttons can be used for driving mode switching and exhaust valve control switch. M1 M2 button + upper cover can realize valve exhaust switch (need to be used with the exhaust of the remote control version), driving mode activator can realize driving mode switch (need to be used with M1 and M2 buttons), which can be set to: 1. Driving Mode switch 2. Valve exhaust switch, no need to lower your head to find the remote control, no need to lower your head to press the driving mode button, to upgrade the grade, convenient and practical.