Powerful red LEDs power the Alpha male testicular bike lights The swinging balls increases visibility Three light modes – solid light/slow flashing/fast flashing Squeeze to turn on and off Made from water resistant silicone These ballsy bike lights are super cool, super powerful and bob around as you ride to increase visibility. The LED Bike Balls are a revolutionary phenomenon in transport illumination! Not only are these a scrotal masterpieces, these also diffuse commuter tensions like nothing else. As you pass by you will bring as smile, or even something more, to the grumpiest commuter. Simple to use, just give them a good squeeze to turn them on and switch between the light modes, providing you with ample flashing opportunities! The Bike Balls attach securely to the undercarriage of your bike saddle, with no risk of awkward dismounts, and bob seductively as you ride along. They are also super easy to put on and off, as well as being waterproof due to their silicone case, so you can ride whatever the weather! So if you are after an awe inspiring bike accessory, you are guaranteed to go nuts for these Bike Balls!