Radio Shack 21-1905 - User Manual

21-1905
RadioShack Copyright
22 Ch GMRS/FRS Two-way Radio
Your RadioShack 22 Channel FRS/GMRS Two-way Radio provides short-range voice radio
service that lets families and groups keep in touch with each other on specific reserved channels.
Your RadioShack 22 Channel FRS/GMRS Two-Way Radio is a lightweight, palm-sized radio you
can use to talk with another person who has a FRS/GMRS radio set to the same frequency as
your radio.
Your radio has 22 channels and 38 different quiet codes, which you can use to talk with another
person who has a GMRS or FRS radio set to the same frequency as your radio. Your radio also
has auto-squelch, so you will not hear anything on a channel unless someone is transmitting
nearby on the same channel.
You can connect an optional speaker/microphone and earphone to the radio (neither supplied,
available at your local RadioShack store).
Your radio’s display has a backlight that turns on for about 5 seconds when you press any key
except PTT.
Your radio’s other features include:
Ø 22 Channels – provide clear communications for up to two miles in FRS channel and up to
three miles in GMRS channel.
Ø Channel Scan – use to find other FRS users.
Ø 38 Quiet Code – eliminates interference from other radios that are not tuned to the same
channel and quiet code as your radio.
Ø Key Beep – short beep generation for key pressed acknowledgement except PTT or FUNC
key.
Ø Vibrate – vibrates for 2 seconds when receiving a signal if the radio has been idle for more
than 30 seconds.
Ø Voice Operated Transmission (VOX) – enables standalone usage and works with
handsfree accessory.
Ø Automatic Power Off – the radio auto power off when the radio is idle for 30, 60 or 90
minutes.
Ø Hi/Lo power selection – select the transmit power 0.5W or 2W in GMRS channel.
Ø Courtesy Tone – at the end of transmission, it generates for end of message
acknowledgement.
Ø Caller ID – In transmitter, user can select the receiver radio to receive the Call. In receiver,
the radio will receive the Call that is address to this radio and display the transmitter ID
number on LCD.
Ø Panic – the radio generates alarm sound when emergency.

Radio Shack 21-1905 Specifications

Frequency and Channels

frequency range	462.5000 – 467.7125 MHz
channels	22

Power

RF output power (low)	400-500 mW ERP
RF output power (high)	1.8-2 W ERP
power supply	6.0 V DC (4 x AA Alkaline)

Battery and Operating Environment

battery life	about 16 hours (alkaline batteries)
operating temperature	-4 to 122 ºF (-20 to 50 ºC)
dimension (HWD)	102 x 57 x 35 mm

Weight

weight	100 gm

Summary

Installing Batteries

Cautions for Battery Installation

Important warnings and recommendations for safely installing batteries, including mixing types or using non-rechargeable ones.

Battery Replacement Indicator

How to interpret the battery icon's segments and when to replace batteries.

Recharging Ni-Cd or Ni-MH Batteries through 6 V DC jack

Charging Cautions

Warnings regarding charging non-rechargeable batteries and using correct power sources for charging.

Charging Process

Step-by-step instructions on how to charge batteries using the 6V DC jack and an adapter.

Recharging Ni-CD or Ni-MH batteries through slow-charger

Slow-Charger Procedure

Instructions for placing batteries and the radio into the slow-charger for recharging.

Operation

Power On;Off

How to turn the radio on and off and adjust the volume using the rotary switch.

Transmitting

Instructions on how to transmit a voice message using the PTT button and power saving limits.

Selecting Channel

Method for manually selecting the desired channel using UP or DOWN keys.

Selecting Quiet Codes

Using Scan

How to scan channels and quiet codes automatically to find active users.

Using Key Lock

Procedure to lock and unlock the keypad, and its implications for other functions.

Using Key Tone and Vibrate

Using VOX

Enabling and adjusting the Voice Operated Transmission (VOX) feature for hands-free communication.

Using APO

Configuring the Automatic Power Off (APO) feature to conserve battery life.

Using Hi;Lo transmitter power

Selecting transmit power levels (0.5W or 2W) for GMRS channels.

Using Courtesy Tone

Using Headset

Connecting and using an optional headset for hands-free operation.

Caller ID Operation

How Caller ID works, including sending, receiving, and the temporary private code setting.

Setting Home ID

Setting Caller ID

Configuring the receiver's ID number for targeted calls or group calls.

Call Melody

How call melodies are generated based on Call ID or Sender ID numbers.

Using Panic

Using the Swivel Belt Clip

Instructions on how to attach and detach the swivel belt clip.

Using an Optional Wrist Strap

Steps to attach an optional wrist strap to the radio for secure carrying.

CARE

General Care Instructions

Guidelines for keeping the radio dry, clean, and in good working condition.

FCC Information

Radio Modifications and Interference

Warnings against modifying the radio and advice on identifying and reducing interference.

FCC Licensing Information

Obtaining a GMRS License

Information on FCC regulations, licensing, and contact details for obtaining forms and assistance.

Safety Information

RF Exposure Guidelines

Precautions for maintaining compliance with RF exposure limits, including antenna distance and body worn usage.

Specifications

Radio Specifications

Technical details such as frequency range, output power, power supply, and dimensions.