So glad a had a flipper zero...

So, Most consumer Bluetooth devices use Bluetooth Class 2, which has an intended range of about 33 feet. Class 1 Bluetooth can extend to 328 feet, in ideal conditions. Like an open field.

Here's where things get spicy though...

Bluetooth Low Energy (BLE or Bluetooth 5) introduced "Coded PHY" modes that can significantly extend range, up to 1312ft in open spaces like open fields.

Hope this helps. ✌️