The heart of the system. One eachis required per system. The U3800 willaccommodate two headsets and should beplaced where radio transmit function is notrequired. Adjusts automatically for 12 or 24VDC power source. Contains system on/off,master volume control, two headset jackswith listen level controls, power inputconnector and two remote output connectors.Draws less than 600 milliampere current.
