PRUNUS L-258 Portable Digital FM/AM/SW Radio User Manual

1. Introduction

Thank you for choosing the PRUNUS L-258 Portable Digital Radio. This compact and versatile radio offers FM, AM (MW), and SW bands, along with MP3 playback capabilities via USB and Micro SD. Designed for ease of use with large buttons and a clear digital display, it is suitable for various environments, both indoors and outdoors. This manual provides detailed instructions to help you operate and maintain your device effectively.

Figure 1: PRUNUS L-258 Portable Digital Radio

The PRUNUS L-258 radio features a blue casing, an extendable antenna, a front speaker grille, and a digital display. The control panel includes large, easy-to-read buttons for mode selection, station tuning, and number input. Side ports include tuning, 5V DC in, AUX, and USB. A wrist strap is also visible.

2. Important Safety Information

• Read all instructions before using the device.
• Keep the device away from water and moisture. Do not expose it to rain or extreme humidity.
• Do not disassemble or attempt to repair the device yourself. Refer all servicing to qualified personnel.
• Avoid exposing the device to direct sunlight, heat sources, or open flames.
• Use only the specified charging methods and cables.
• Keep out of reach of children.
• Dispose of batteries and electronic components responsibly according to local regulations.

3. Package Contents

Please check the package for the following items:

• PRUNUS L-258 Portable Digital Radio
• USB Charging Cable
• Rechargeable Lithium-ion Battery (pre-installed or separate)
• User Manual (this document)
• Wrist Strap

4. Product Overview

The PRUNUS L-258 radio is designed for portability and ease of use. It features a compact size, large tactile buttons, and a clear digital display.

Figure 2: Control Panel and Display

This image highlights the radio's user-friendly interface, featuring large, textured rubber buttons for easy operation and a bright digital display that shows frequency and other information clearly. The buttons include playback controls, mode selection (FM, AM, SW), scan, memory/delete, and a numeric keypad (0-9).

4.1 Key Features

• Multi-band Radio: Supports FM (87.5-108 MHz), AM/MW (522-1710 KHz), and SW (2300-21950 KHz).
• Automatic Station Storage: One-touch scan to automatically find and save up to 297 stations (99 FM, 99 SW, 99 AM).
• MP3 Playback: Supports music playback from USB flash drives and Micro SD/TF cards.
• AUX Input: Connect external audio devices.
• Rechargeable Battery: Built-in Lithium-ion battery for portable use.
• Clear Sound: Equipped with dual 3W speakers for enhanced audio quality.
• User-Friendly Design: Large rubber buttons and a clear digital display for easy readability.

Figure 3: Universal Compatibility

This diagram illustrates the radio's versatile input options, including FM/AM/SW radio reception, MP3 playback from Micro SD/TF cards and USB flash drives, and audio input via AUX jack from devices like MP3/MP4 players or computers.

5. Setup

5.1 Charging the Battery

Before first use, fully charge the radio's internal Lithium-ion battery. The radio can be charged via various methods:

1. Connect the supplied USB charging cable to the 5V IN port on the side of the radio.
2. Connect the other end of the USB cable to a compatible USB power source, such as a USB adapter, computer USB port, car charger, or power bank.
3. During charging, a red indicator light will illuminate.
4. The indicator light will turn green once the battery is fully charged.

Note: Ensure the radio is turned off during charging for optimal battery life.

Figure 4: Charging and User Interface Details

This image details the radio's user-friendly aspects, including the large numeric buttons, the "SCAN" button for automatic station search, the charging indicator light (red for charging, green for full), and the stable stand for placement.

6. Operating Instructions

6.1 Power On/Off and Volume Control

• To power on the radio, slide the ON/OFF switch (usually located on the top or side) to the "ON" position.
• To power off, slide the switch to the "OFF" position.
• Adjust the volume using the Tuning/Volume knob on the side of the radio. Rotate clockwise to increase volume, counter-clockwise to decrease.

6.2 Radio Mode (FM/AM/SW)

The radio supports FM, AM (MW), and SW bands. Extend the telescopic antenna for better reception, especially for FM and SW bands.

Figure 5: Multi-band Reception with Extended Antenna

This image shows the PRUNUS L-258 radio in an outdoor setting, demonstrating the importance of extending the telescopic antenna for optimal reception across its multi-band capabilities (FM, AM, SW).

1. Press the FM, AM, or SW button to select the desired radio band. The display will show the current frequency.
2. Automatic Scan and Store: Press the SCAN button. The radio will automatically scan for available stations and store them in memory. Up to 99 stations can be stored per band.
3. Recalling Stored Stations: Use the numeric keypad (0-9) to directly enter the memory number of a stored station, or use the ❮ / ❯ buttons to navigate through stored stations.
4. Manual Station Management: The "Memory/Delete" button allows you to manually store or delete stations after an automatic scan. Consult the on-screen prompts for specific actions.

6.3 MP3 Playback (USB/Micro SD)

The radio can play MP3 audio files from a USB flash drive or a Micro SD/TF card.

1. Insert a USB flash drive into the USB port or a Micro SD/TF card into the TF CARD slot.
2. The radio should automatically switch to MP3 mode. If not, press the MP3 button.
3. Use the ❮ / ❯ buttons to skip tracks.
4. Use the ❚❚ button to pause/play.
5. The numeric keypad can be used to directly select track numbers if supported by the firmware.

6.4 AUX Input

Connect external audio devices, such as smartphones or MP3 players, using the AUX input.

1. Connect a 3.5mm audio cable (not included) from your external device's headphone jack to the AUX port on the radio.
2. Press the AUX button (if available, or cycle through modes until AUX is selected).
3. Control playback and volume from your external device. The radio's volume control will also affect the output.

7. Maintenance

7.1 Cleaning

• Turn off the radio and disconnect it from any power source before cleaning.
• Use a soft, dry cloth to wipe the exterior of the radio.
• Do not use liquid cleaners, aerosols, or abrasive chemicals, as these may damage the finish or internal components.

7.2 Battery Care

• To prolong battery life, avoid fully discharging the battery frequently.
• If the radio will not be used for an extended period, charge it to about 50% and store it in a cool, dry place. Recharge every 3-6 months.
• Do not expose the battery to extreme temperatures.

8. Troubleshooting

9. Specifications

Figure 6: Compact Size Comparison

This image visually compares the PRUNUS L-258 radio to an iPhone 8 Plus, illustrating its compact, pocket-sized dimensions (approximately 128mm x 82mm x 28mm) for easy portability.

10. Warranty and Support

10.1 Warranty Information

PRUNUS products are manufactured to high-quality standards. For specific warranty details, please refer to the warranty card included with your purchase or visit the official PRUNUS website. The warranty typically covers manufacturing defects for a specified period from the date of purchase.

10.2 Customer Support

If you encounter any issues or have questions regarding your PRUNUS L-258 radio, please contact PRUNUS customer support. You can usually find contact information on the product packaging, the official PRUNUS website, or through your retailer.

When contacting support, please have your model number (L-258 or RADIO258CB) and purchase details ready.