Q-Lite Anti Thief USB Shaking Alarm Led Bicycle Rear Light Red
Super Cool anti-theif LED light, its loud enough that near 50 meter can all hear it. When alarm is activated, it will ring for 10 seconds.
When you set to alarm mode, you will hear "bee bee" two sounds, that means alarm mode is perfect set up.
When someone is trying to move or lift your bicycle, alarm will activated it.