The clerks at the magic shop were busy prepping the store for the day ahead when the younger employee found something he hadn't seen before. A new product, perhaps? It looked like your average belt but with a dial to the side.
"Hey, boss. What's this?" The older clerk looked over and saw the belt. Oh, right. He needed to explain how this thing operates to his subordinate; so he knows how to sell it.
"Oh, that. This belt is simply known as the muscle belt. It's a new product that makes the wearer bigger and more muscular, but only as long as you wear the belt. You just put it on and then choose a setting on the dial. The number indicates how muscular you get, with one making you a lean swimmer's build while five making you a bodybuilder. There's even a reality-changing setting that makes it so that everyone around you thinks you've always been that fit and muscular."
The younger employee listened closely to his bosses' explanations, trying to absorb as much information as he could. Although, as he listened to the explanation, he noticed that this all sounded familiar. Like he heard it before.
"Hey, wasn't there a product like this released a few years ago?" The younger employee asked, "I think they called it a girdle even though it was a belt too."
"Yeah, there was. It was discontinued after a while, though. That belt changed reality by default, which made it easy for people to steal it. All they needed to do was steal the belt, wear it, and the person they stole it from wouldn't remember the belt ever existed. There's still probably a few of those belts floating around even after the recall. Anyway, the muscle belt wasn't made by the same people as the girdle, but they addressed the stealing issue by having you register the user as the owner. So if they let someone borrow this belt and that person changes reality, the owner will still remember the old reality. There's also smartphone integration so you can change the settings on your phone instead of the belt itself."
"Huh, even the magic items are going online." The younger employee commented. Guess even magic has to keep up with the smartphone revolution, "One question though, what does it do for fat?"
"Oh. Well, by default, the belt will remove all fat and give the users abs. But apparently, there is an option that lets the user keeps the fat content they have instead of getting rid of it. Guess people just like that look or need the extra padding for sports. Anyway, I think that's all I need to explain to you. Everything clear?"
"Crystal," the younger clerk replied. After that, the two finished preparing for today's opening. It wasn't long before a customer discovered the muscle belt.