The U3400 Master Station is the heart of the Series 3400 Communication
System. It contains the power supply, amplifier and impedance selector in a
single, sturdy metal box. The Master Station also has four output connectors,
a 12-foot grounded power cord, roll bar/carry handle, master volume control
and system on/off switch.

Belt Stations can be connected to the four Master Station outputs (via extension
cords if distance necessitates) to form a four-man communication system.

Also, Remote Junction Modules may be connected to these outputs to
expand the system.

SPECIFICATIONS:
Input 110-125 VAC,
50-60 Hz, Output 24 VDC,
Max current 1/2 amp.
Dimensions: 5 3/4” x 9 1/2” x 4 3/4”.