Light reminder: Turn signal-turn left, the leaf shape indicator on the left flashes blue; Turn right, the leaf shape indicator on the right flashes blue; Go straight, the indicators on both sides are always blue. Power indicator: battery voltage is 34V-34.5V0.5V, and the power indicator is flashing green; when the battery voltage is higher than 34.5V0.5V, the power indicator is steady green; The battery voltage is lower than 34V0.5V, and the battery indicator is steady red (and raise your head while riding).When charging, it flashes yellow, and it is green when it is full (powered on). Alarm indicator light: When the pedal inclination exceeds 15, the status light is steady red and the motor stops. Safety reminder: Low battery reminder (when the voltage is lower than 34V, the red light flashes with intermittent buzzer sound). Speed limit protection: 9KM/H activates the speed limit function; 10KM/H activates the buzzer to overspeed alarm (and raise your head while riding). Name:scooter main board controller Working voltage: 34-42V Maximum power: 700W : 10 minutes Fit:for Self Balancing Colour:As Shown Material:PCB Package Contents: 1 set * scooter main board controller Only the above package content, other products are not included. Note: Light reflection 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.