Light up & Shutdown: Turn switch to "ON" button for first use, and no need of manual operation afterwards;
Auto Shutdown: Keep the taillight in state of "ON" and entirely being still (no shaking) for 3-4 minutes in the dark, and it will shutdown automatically;
Auto Light up: The taillight will light up automatically when there is any shake in state of "ON";
Light Sensitive function: When taillight is in "on" state, and under the strong light spotlight for several seconds till enough light is detected, the taillight will shutdown automatically, and then move the taillight to the dark for several seconds, it will light up automatically.
Charging method: Built-in lithium battery, yellow indicator light will shutdown automatically when full charged.