1. Install light bar on the left and right side of bicycle back bracket.
2. Install sensor and magnet on the left hand grip (that is rear brake).
3. When you are cycling, the light bar will automatically be on with 50% brightness of itself to remind the following cars to keep a distance away. When you stop for more than 10s, the light bar will automatically be off.
4. When in emergency brake, the light bar will be on with 100% brightness of itself to remind the following cars to be careful. Release the brake, the light bar will go back to the previous state.
5. Powered by 3 x AAA batteries.
6. With 6 high light LEDs on each side light bar.
7. Using epoxy resin transparent adhesive tape to cover the LEDs in order to achieve the waterproof effect.