GHS02, Guide headset, Tour Guide for ATT100 GHS02 Tour Guide Headset, microphone/earphone/PTT with Caps Lock button for longer announcements. The headset allows you to not only transmit your own announcements, but also stream music or spoken content via MP3 players. With 2-pin connector and 115-cm cable for use with the Albrecht ATT100 Tour Guide transmitter.