A headband is supplied and can be fitted. However, the headset remains a mono headset. Another headset is not compatible with the base station, as the diameter of the other Jabra headsets is larger.
However, it is possible to pair other headsets, but you cannot place them on the base station for charging.
If you want a comfortable stereo headset, check out the Jabra Engage 75 Stereo.
Jabra Engage 75 Stereo (Wireless)