As Condor says, you need to make sure the Transmitter and Receiver (in the headphones) have a clean line of sight. The receiver is on the "controls" side of the headphones which is actually labelled L (left) on the headband. No problem spinning them around the other way as detectors output mono signal.
Yes, older Deteknix version with the hardwired audio cable was good and bad. The good was that the USB port suffered a lot less wear. You could even choose to keep the charge cable permanently inserted. The bad part was that if your audio cable went bad you had to send it back for a new one to be fitted. With the new Quest version, if your audio cable goes bad it is just plug and play with a new cable.
With lots of use, nearly all USB ports wear and become problematic - pretty much like every mobile and laptop I've every used. Keep them clean, and be careful with your cables, and you should get good service life out of them. All Quest WireFree gear is covered by a 2 yr warranty if problems do arise.
Yes, older Deteknix version with the hardwired audio cable was good and bad. The good was that the USB port suffered a lot less wear. You could even choose to keep the charge cable permanently inserted. The bad part was that if your audio cable went bad you had to send it back for a new one to be fitted. With the new Quest version, if your audio cable goes bad it is just plug and play with a new cable.
With lots of use, nearly all USB ports wear and become problematic - pretty much like every mobile and laptop I've every used. Keep them clean, and be careful with your cables, and you should get good service life out of them. All Quest WireFree gear is covered by a 2 yr warranty if problems do arise.