A switch on top of the controller is for controlling LED changes. Press for the first time: 7 LEDs will be bright always. Press for the second time: when a motor vibrates, 7 LEDs will be blinking at a frequency from slow to fast (Depends on the vibration). No vibration, the LEDs are off. Press for the third time: turn off the LEDs blinking function. A switch on top of the controller is for controlling LED changes. Press for the first time: 7 LEDs will be bright always. Press for the second time: when a motor vibrates, 7 LEDs will be blinking at a frequency from slow to fast (Depends on the vibration). No vibration, the LEDs are off. Press for the third time: turn off the LEDs blinking function. Brand SONY SKU 100222016_NP-1020474109 Model Pc Controller