... handsfree convenience, the 1090 with pendant type microphone If both hands free is what you need, this microphone is perfect. 2.4GHz ... combined in this all-in-one unit, for revolutionary, cable-free convenience.More specifications:Transmitter(Holding) Frequency Scope: 2.4~2 ... : 95.5*33.5*18(mm) If any question feel free to contact :Wendy +86-13535465156Skype:wendy6286 teaching aids & teaching ...