Most Bluetooth devices, including BOSTA headsets and accessories, have a range of about 10 meters (30 feet). However, there are factors that can increase or decrease your range and signal strength.
Like most radio transmissions, line of sight plays an important role. If your headset has a clear line of sight to your phone, you may be able to go beyond the 30 feet mark. On the other hand, if you do not have good line of sight or have something like a wall between the headset and phone, your range may be reduced.
Additionally, other factors may interfere with Bluetooth signal transmission. Devices emitting radio waves, or minor non-harmful radiation from every day electronic devices. The best way to avoid interference is to remove your phone or other Bluetooth device from contact or close proximity to the source.