You'll need to confirm voltage amplitude of signal. And Ampere level.
You need to determine the correct place to attach an antenna.
Also polarity of signal (whether plain AC, or AC riding a DC component).
The antenna can be as simple as a foot or two of wire. For best efficiency the antenna should be tuned to the oscillator, although this is not easy when you apply various frequencies.
The product description might tell you a lot by what it says or doesn't say. Does it mention the ability to broadcast radio waves? Does the seller make it a marketing point by saying 'build your own home-based radio station'?
There is such a thing as legal micro-power fm radio broadcasting (in the US). You should check local regulations, of course.