IC-F21 is a walkie-talkie product with features such as channel selection, volume control, and squelch. It can be used for communication and receiving information. Prior to use, it requires charging preparation, and the status of the indicator light indicates the charging status and battery level. Basic operations include turning on the power switch, selecting channels, and pressing the transmit key for communication. When not in use for a long time, the battery should be fully charged and removed.
This manual describes the IC F21 walkie‑talkie's components, including the channel selector, power/volume control, static‑noise key, transmit key, antenna connector, display lamp, and external earphone/mic jack. It also explains how to connect the device to its charger and the meaning of the LED status lights.
Basic operation instructions cover powering on the unit, adjusting volume, selecting a channel, transmitting by pressing the transmit key, and receiving by releasing it. Safety notes advise against prolonged transmission to avoid overheating and recommend fully charging the battery before storage. This manual is written in Chinese.
| Maximum continuous charging time | 12 hours |
|---|---|
| LED indicator for transmitting | Red solid |
| LED indicator for receiving | Green solid |
| LED indicator for low battery | Green slow flash |
| LED indicator for critically low battery | Red fast flash |
When the charger’s red light changes to green, the battery is fully charged.
Do not charge the device for more than 12 hours continuously.