ive never had a spyder give me any problems. my friend autococker broke before mine lol. but you just clamp the velocty measurer onto the end of the barrel and it measures how fast the ball comes out in Feet Per Second when you shoot through it, and if you switch modes it will tell you how many Balls Per Second youre firing and how many total balls lol. ill take 10 bux for the gloves.

and by obo, i mean more than 65 for everything