Samson Airline 77 F-Style E4 Guitar-System, UHF-System contains AF1 guitar wireless transmitter with straight plug, CR 77- reciever, True Diversity, frequency 864.875 MHz, volume automatic controller, automatic squelch control, bal. XLR out, unbal. 6,3mm jack out, This wireless system is only licensed for use in Germany. If you want to use in other countries, please ask for possible frequencies.