We have all experienced it. You are doing your daily 10K, you are close to the end and your legs are failing. All you need is some hard bass to push you across the finishing line, but everything sounds like a phone from the ’70s through those crappy earphones. Your plight has now come to an end. With the easily insertable buttplug subwoofer, you will be hitting those brown notes while running and have all the musical motivation you need to achieve greatness. Buy it now!