... Having circuit output function, being able to be connected with amplifier of large capacity to amplify Transmitter uses two units of ... touring, visiting, teaching and so on activities of tourism, training class an so on groups Used in reception of visitants in ... some collection activities. Selectable Accessories: Headset Microphone WaistBandWB01 HM01 Wired Amplifier AMP100/Tour Guide System/Tour Guide