
At this time there are two leading technologies used for wireless headsets.
Bluetooth (2.4GHz) headsets typically provide phone-to-headset distances of 30 to 75 feet. In telecommunications, this technology was originally used for cellphone headsets, but is now also used to connect headsets to office phones and computers.
DECT 6.0 (1.9MHz) headsets typically provides phone-to-headset distances of up to 350 feet. DECT headsets are usually larger and heavier than Bluetooth headsets.
Your range will be affected by product design, battery strength, and the environment.