The shorts are faulty. Got them last week, tried them once. It's got NO safe indication of if you have increased strength too much for the crotch area and literally shocks and hurts you making you jump, because you turn it up trying to get the intensity of the butt region to be at a level that even does anything at all. It's terribly expensive rubbish. Can't believe I wasted money on this unsafe, cheapshit-quality product with no "dial" or number of intensity, the butt region does NOTHING