the t.bone TWS One B Lapel
the t.bone TWS One B Lapel, UHF Wireless System, 1 Fixed frequency, ISM band, Non-diversity, A maximum of transmitters 2 from the TWS One Series can be operated simultaneously with varying frequencies (A, B, C or D), Jack output, Pocket transmitter with 3.5 mm jack connector, Operates with 2x AA batteries