• Using Cycling Bike Balls Bicycle Rear Light is the only time when flashing your testicles is appropriate!
• Available in 4 colors - Red, Green, Blue and Color Changing.
• Attaches effortlessly to your bicycle seat rail, backpack, tent, stroller and more!
• Turn them on/off and change light modes with a gentle squeeze to the nutsack.
• Made of waterproof high-grade silicone body and built for rough riding!
• Three LED light modes - solid / slow flashing / fast flashing
• 360-degree glow.
• Up to 100 hours of continuous lighting.
• 2 x CR2032 replaceable batteries included.
• Measures 5.7" x 2.36" / 14.5cm x 6cm 

Spread laughter and get yourself noticed by drivers with a big pair of glowing testicles light dangling off the back of your seat.
Use of Cycling Bike Balls Bicycle Rear Light is guaranteed to cheer up even the grumpiest driver!