BackFlash 

LED stands for Light Emitting Diode, and considering how much these little guys do to keep you safe on your bike we figured you should know their whole name. The BackFlash tail light alerts traffic of your presence with 5 of them, including side mounted LEDs that keep you visible from 180 degrees.

• Seat post mount with quick release light bracket
• clip mount for use on belts or packs
• 4 light modes: steady, flashing, dance party, and Euro dance party
• 2 AAA batteries included
• Lifetime warranty (click for details)