Best remote vibrator to wear in public?

I’m looking for a vibrator that my wife can wear when we go out on dates and that I can discreetly activate to tease her while we’re walking around or sitting at a restaurant or bar. I wanted it to be comfortable and not have to worry about it moving or falling. Ideally, she’d almost forget about the “what if” until I triggered it. I also wanted a standard remote that could be easily and discreetly triggered in my pocket, rather than an app. What are the good options for this?

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