The very first set of WVC-PRO's (roughly 20) were designed and shipped with a single external antenna.
Users quickly reported the unit had limited bluetooth connectivity range. This same issue can also affect the units ability to connect to a WiFi access point interfering with the firmware update process for CPU 2.
In order to remedy this, we added a secondary smaller antenna to all of other units to boost bluetooth range.
We are offering a free upgrade to any units which were shipped with a single antenna. Simply email contact@LF-Audio.com to discuss shipping your unit in and receiving a free update.