the t.bone TWS One C Vocal, UHF Wireless-System, 1 fixed frequency, ISM Band, Non-Diversity, Jack Output, handheld transmitter with dynamic capsule, cardioid, works with 2x AA batteries, no licence required all over europe, frequency C 864.500 MHz, max. 2 systems parallel. Note: use output connector just with unbalanced cables, incl. Jack-Jack cable and case