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General| Channels | 16 |
|---|---|
| Battery Capacity | 1100 mAh |
| Operating Voltage | 3.7V |
| Weight | 180g |
| Antenna Impedance | 50 ohm |
| Channel Spacing | 12.5/25kHz |
| Waterproof Rating | Not rated |
A welcome message thanking customers for choosing the RT21 two-way radio and highlighting its features.
Lists critical safety instructions for operating the radio, including legal compliance, hazardous areas, and device care.
Guides users on how to unpack the radio and verify the included accessories, advising to contact the dealer if anything is missing.
Identifies and explains the key parts of the radio, such as the antenna, speaker, PTT switch, and knobs, using a diagram.
Provides crucial guidelines for using the designated battery, including charging temperature, power-off requirement during charging, and warnings about conductive materials.
Details the step-by-step process for charging the battery and explains the meaning of charging indicator lights.
Explains how the charger performs a self-test upon powering up, indicating its readiness to charge the battery.
Describes the meaning of the red indicator light during charging, including normal charging and trickling charge states.
Offers essential precautions for charging, such as initial charging cycles for optimal capacity and advice for exhausted batteries.
Provides guidance on using the short thick antenna for short-distance communication and considerations for communication range in different environments.
Step-by-step instructions with diagrams for attaching and detaching the Li-ion battery from the radio.
Guides users on how to attach and remove the belt clip using the provided screws, illustrated with diagrams.
Explains how to connect an external headset to the microphone/speaker jack and notes its effect on water-tightness.
Details how to use the scan function, including activating it, how it scans channels, and conditions for its availability.
Explains the default-enabled battery save function, which helps extend standby time.
Describes the busy channel lock feature, which prohibits transmission on channels with signals or specific CTCSS/DCS settings.
Details the voice prompt feature, including channel annunciation and low battery alerts, and mentions the default English setting.
Explains the low battery alert mechanism and how the squelch level affects background noise and communication range.
Details the purpose of the Time Out Timer (TOT) in preventing continuous transmission and potential damage.
Explains CTCSS/DCS as sub-audio signaling to prevent receiving unwanted signals and how it affects communication.
Describes the power protection function that prohibits transmission when the voltage is outside the normal operating range.
Provides a table listing common problems like 'No Electrical Source' or 'Short Operating Time' with corresponding solutions.
Presents detailed technical specifications for the radio, including model, frequency range, output power, and channel protocol, noting FRS channels.
Outlines the importance of the warranty card and how it should be filled and kept for warranty service.
Emphasizes reading the manual for safe usage, RF energy awareness, and compliance with exposure limits.
Warns about antenna safety, including safe distance, not using damaged antennas, and prohibitions on switching antennas.
Details critical safety measures for batteries, including avoiding short circuits, hazardous atmospheres, and proper handling to prevent injury.
Lists comprehensive safety instructions for using the battery charger, covering power, environment, maintenance, and cord safety.
Explains potential electromagnetic interference, susceptibility of devices, and the need to turn off radios in sensitive locations like hospitals or aircraft.
Advises users with medical devices like pacemakers to consult physicians and take precautions against radio frequency interference.
Provides guidance on using communication devices while driving, emphasizing attention to the road and legal regulations.
Warns against placing radios in air bag deployment areas due to the force of inflation.
Instructs users to turn off radios in potentially explosive areas and avoid charging batteries there to prevent explosions or fires.
Advises turning off the radio near electrical blasting caps or in posted blasting areas to avoid interference.
Details the radio's compliance with US FCC regulations regarding RF exposure, referencing standards and guidelines.
Provides essential safety information on RF exposure from the portable transceiver, emphasizing transmitting time limits and the FCC's adopted guidelines.
Warns that unauthorized modifications can void user authority and that transmitter adjustments must be made by certified personnel.
Explains FCC RF exposure compliance for body-worn operation, recommending the use of specified accessories like belt clips or holsters.
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