1.
Radio signal measurement
2.
Designated communication range
3.
Signal transmission booster
4.
Direct station communication
5.
Two-way communication mode
6.
Signal strength measurement
7.
Distance between signal peaks
8.
Signal transmission method
9.
Signal information encoding
10.
Communication signal range
11.
Signal frequency generator
12.
Noise reduction mechanism
13.
Electrical resistance measurement
14.
Electronic signal amplifier
15.
Electrical current measurement
16.
Power output measurement
17.
Electrical pressure unit
18.
Electrical signal reference
19.
Complete electrical path
20.
Non-professional radio operator
21.
Unique radio identification
22.
Verbal letter communication
23.
Frequency measurement unit
24.
Designated radio frequency range
