The frequency of broadcast signals is set by the Advertising Interval.
By default, our beacons broadcast their signal every 350ms. We have found that this offers a good balance of stability and battery life.
Interval can be set to any value within the range from 20 to 10240, except for Beacon Pro BP16-3 - in this case, lower bound starts at 100ms. Interval can be changed using our mobile app.
Take a look at our article: Advertising Interval - best practice for more information.