Marketing Information | Califone Beltpack Transmitter with 16 selectable channels, is flexible and comfortable for more effective presentations. Califone Beltpack Transmitter with 16 selectable channels is flexible and comfortable for more effective presentations. This versatile transmitter does not have a build-in microphone and should be used with microphones HBM319 (#1544059), LM319 (#1543838), NM319 (#1360185) and OE319 (#1360186), sold separately |