BK-1200 is Belt Pack for MDS-240 It is 2.4G full-duplex digital BK-1200 works with 3 x AA size battery The battery life is 2 hours with transmit, 5 hours for listening The belt packs BK-1200 can work without the base station. Up to five of them can create a group within themselves.
Microphone button
Volume control
Mono earphone output