Do you have a question about the Radio Shack 21-1904 and is the answer not in the manual?
Instructions for installing and using AAA batteries in the radio.
How to power the radio on/off and control audio volume levels.
Procedure for sending voice messages to other radios.
Steps to choose a communication channel on the radio.
Requirement for a GMRS license to operate the radio legally.
| Model | 21-1904 |
|---|---|
| Type | FRS/GMRS Two-Way Radio |
| Channels | 22 |
| Privacy Codes | 38 CTCSS |
| Battery Type | 3x AAA alkaline batteries |
| VOX | Yes |
| Backlit Display | Yes |
| Power Output | 0.5 Watts (FRS), Up to 2 Watts (GMRS) |












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