JTS R-4 Instruction Manual page 36

◎Squelch
+15~ -5：the higher the value, the less sensitive
the receiving, and vice versa. The default is 0.
◎Device ID
Device ID: 0~255: this setting affects the use of REMOSET;
both the receiver and transmitter must be on the same
Device ID before REMOSET is available.
Note: this does not apply when the
microphone Device ID is not activated.
◎Output Level
Line Line output is selected for channel 1
balanced output level.
Mic Mic output is selected for channel 1
balanced output level.
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