If you have never heard of a placement, you are missing pretty much everything. One of the most basic ways of raising some quick cash.
We don't know!! They won't let us hear them.
The little four rotored spider drones are probably quieter than the ROAM-e helicopter types as the rotor tip velocity will be less. But I don't see how they would be quieter than a counter-rotating helicopter toy, as they must be a lot heavier.
IOT Price at posting:
11.0¢ Sentiment: None Disclosure: Not Held
They won't let us hear them.
