According to the datasheet, you should give it a square wave with a duty cycle of 50% at a frequency of 2400 Hz with an amplitude of 5 V. You could make that with a 555 timer chip, 2 resistors, and 2 capacitors.
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The short answer is that unless you are dealing with professional power levels in the several watts range, RF is very difficult to cause injury with.
Long answer
RF doesn't affect humans directly unless there is a tremendous amount of power. Effects are typically thermal, when a particular chemical bond is struck just-so, it will absorb a photon, moving it slightly. Enough heating will damage cells by denaturing or "cooking" proteins.
Particular wavelengths (2.4 GHz) are well absorbed by water and fat, but absorption is still very diffuse so it would take a tremendous dose to cause enough heating in any one area to cause damage. The FCC safe exposure limit is 1.6 W absorbed per kilogram (as per one source), and 4 W/kg (in following link) for the entire body.
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Atomic nuclei can also also respond to RF, allowing for nuclear magnetic resonance spectroscopy (or MRIs), but this is a strictly nuclear effect and has no influence on chemical bonds.
IR and light obviously can cause burns, but only at sufficient power. IR lasers can be particularly hazardous to eyes, as it invisible it will not trigger a blink or aversion reflex, allowing a large, damaging dose to be absorbed before noticing.
Higher energy photons, UV, X-ray, and gamma, are able to ionize atoms when they strike them, causing unexpected chemical reactions to occur which can destroy, damage, or mutate cells.
These are all forms of "radiation", but the layperson couldn't tell what the implications of non-ionizing versus ionizing radiation are, which causes all sorts of unfounded fears of these invisible phantoms that carry our cell phone calls and webpages.
Best Answer
This is a intentional radiator. That means, in the US at least, a FCC certification number must be available on the package somewhere. Look up that number to get the details of what frequency and power the transmitter is permitted to use.
I expect there is a similar mechanism in other jurisdictions.