She tries it on herself

"Only one way to find out," she told herself as she cautiously grabbed the collar. Stella went to her spare bedroom, where she keeps the full-size mirror she got for her birthday some years ago.

As she apprehensivly put the collar around her neck, she felt a slight tingling as though something had changed, but it quickly disappeared. Oddly, she found the collar rather comfortable. She had often fantasized about stuff like this, and got some accompanying gear, but she expected a collar to be a little rougher. This, however, was soft and padded on the inside, and seemingly perfectly adjusted to her neck. It was noticable enough that she wasn't likely to forget it was on, but no matter how Stella turned her head, it never got in the way or scratched her in any way.

Now that the collar itself was no longer an issue, it was time for the 'fun' part. She thought of what it could do if it was real. "World domination of course," she said as she contemplated the possibilities. "Or maybe..." No no, she shouldn't go there. Yet. Stella braced herself and gave her reflection a simple order. "Put your hands out front of you." She wasn't sure why she refered to her reflection like it was a another person, but she paid it no mind.

As soon as the words left her mouth, her body obeyed. Her hands moved up in mere moments, and her reactionary resistance did little to slow herself down. As soon as she finished her own order though, she regained control, and put her hands back down.

Very quickly recovering from her horror, she exclaimed "What the FUCK?" Stella's mind raced. It was real, it worked and it could really control people. Her mind raced to think what she should do with it. She gulped as her mind sifted through every possible idea, often wandering towards more... erotic fantasies.

She remembered what the manual said. The collar could control arousal, right? "Nobody's here. Nobody going to come. No one has to know what I do with it right?," she reasoned to herself as her desires grew.

She thought of a good command to give herself, remembering the smut she read and taking something from that. "Wearing the collar really turns you on."

Her body shivered. The heat started flowing to her crotch immediately. Sweat rolled down her forehead. Her breathed hitched when the wave hit her, and it got heavy soon after. "W-Woah that's good." She said as her arousal only grew. Stella wondered what else this collar was capable of, her fantasies only fanning the fire in her nethers.