The Eartec Monarch headset with integrated PTT and Kenwood 2-pin connector was originally designed for use with commercial voice recognition computers. This lightweight headset is made from PBT, making it suitable for use even in harsh industrial environments. The thin headband of the headset offers a unisex fit, whether on a television studio floor or in a crane cab. The Push-to-Talk button acts as an intermediary between the headset and the transceiver while allowing users to wear their radios clipped to their belt. Compatibility - TK-208, TK-2100 (Protalk), TK-2102 (Protalk), TK-2130 (Protalk XLS), TK-2160, TK-220, TK-240, TK-240D, TK-248, TK-250, TK-260, TK-260D, TK-260G, TK-270, TK-308, TK-2170, TK-3170, TK-272G, TK-3100 (Protalk), TK-270G, TK-3160, TK-320, TK-340,TK-340D, TK-348, TK-350, TK-353, TK-360, TK-360G, TK-370, TK-370G, TK-372G, TK-373, TK-430, TK-431, TK-3101 (Freetalk), TK-3102 (Protalk), TK-3130 (Protalk XLS), TK-3131(Freetalk XLS), Protalk TK-3220, TH-22AT, TH-235A, TH-D7A(G), TH-F6, TH-G71A, TH-K2AT, TH-77A, TH-78A, TH-28A, TH-48A, TH-42AT, Freetalk UBZ Series