the t.bone TWS One A Headset
the t.bone TWS One A Headset, UHF Wireless System, 1 Fixed frequency, ISM Band, Non-diversity, Max. of 2 devices from the TWS One Series can be operated in parallel under various frequencies (A, B, C or D), Output: jack 6.3 mm, Pocket transmitter with 3.5 mm jack connector, Operates with 2x AA batteries