After about 4 months of usage time I can no longer use the set as the USB transceiver will no longer be loaded from the PC. You will see a display that is the transceiver 'disturbed'. The trader this Sets is Amazon. Complaints opportunities do not exist for this set. So procure all things new, separate Transceiver does not exist. So the next time you buy the warranty conditions necessarily aware in advance. To 2 years are indeed today really standard.