It is an application of flashing lights. You can set the flashing interval every 0.1 seconds.
Please use it as a whereabouts notification when walking at night or cycling at night.

How to use
1. Set the flashing interval
2. Turn on the light
3. Power off
4. The light blinks at the specified interval even when the power is off.

The flashing interval can be set every 100 msec between "always on" and "100-1500msec”.

Please try once !