Press and hold the power switch for 3 seconds, the system will automatically enter the self-check mode when it is turned on.
After the power-on self-test is completed, tap twice to enter into the fast flash mode.
Slow flashing is one of the always-on modes, this mode can be selected when the traffic heavy!
When the brake is detected during riding, the brake light will light up automatically.
It can also improve the safety of night riding and vehicle intersection without using power supply.