SS3900EGHP
Mic Gain: Adjusts microphone gain in transmit mode.
RF Gain: Adjusts receivers gain for weak or strong signals.
SWR Calibration: Allows calibration of SWR meter to match the antenna to your radio for maximum radiated power.
Band selector: Band coverage in 6 switched steps.
NB-ANL On-Off switch: Works in conjunction to reduce noise in mobile operation.
Front panel SWR meter: Built in meter to monitor signal strength, RF output and SWR.
Talk back switch: Enables talk back.
Echo/Time control: Controls the echo effects.