This document describes the PRUNUS J-401 AM/FM/SW Digital Radio, a portable device designed for radio reception, music playback, and recording. The device emphasizes ease of use and portability, making it a "Perfect Partner of Your Life."
Function Description
The PRUNUS J-401 serves multiple functions:
- Radio Reception: It can receive AM, FM, and SW bands, allowing users to tune into a wide range of radio stations. Channels can be searched automatically or manually.
- Music Playback: The radio supports MP3 and WMA audio formats and can play music from a TF card (up to 32GB) or via an AUX input, allowing connection to mobile phones or computers.
- Recording Function: Users can record external sounds using the built-in microphone, audio from the AUX input, or directly from AM/FM/SW radio channels onto a TF card.
- Other Functions: Includes a silent mode, a lock button to prevent accidental presses, and earphone support for private listening.
Important Technical Specifications
- Model No.: J-401
- Memory Support: TF Card (Up to 32GB) for recording and MP3 playback.
- Screen Resolution: 128 x 64dpi.
- Audio Format: MP3, WMA.
- Bands:
- AM: 520 - 1710KHz
- FM: 87 – 108MHz
- SW: 4.75 - 21.85MHz
- Number of Radio Stations Stored:
- Earphone Output: Standard 3.5mm Stereo.
- Audio Input: Standard 3.5mm Double Channels.
- Power: 2W.
- Lithium Battery: BL – 5C (1200mAh).
- Dimension: 135 x 31 x 80mm.
- Weight: 170g (radio) + 21g (battery).
- Package Included: Radio x1, Rechargeable Li-ion Battery x1, USB Charging Cable x1, AUX Cable x1, User Manual x1.
Usage Features
Power On/Off: The device requires a long press of the power switch to turn on or off. A safety feature prevents accidental shutdown during radio system and MP3 playback settings to avoid data loss. The battery should not be removed while the radio is on.
Radio Settings:
- Auto Off: A clock icon appears on the display, indicating a countdown. Setting the time to 0 minutes or turning off the radio cancels this feature.
- Contrast: Screen contrast is adjustable from 1-15.
- Backlight Time: Options include Always, 5S, 10S, 15S, 20S, or Light Off.
- Language: Supports Simplified Chinese, English, and Japanese.
- Record Set: Offers Simple Record (64Kbs), Quality Record (96Kbs), and Super Record (128Kbs).
- AM Stepping Set: Allows selection between 9KHz and 10KHz stepping, crucial for accurate channel search in different regions (e.g., 10KHz for North America, 9KHz for Europe).
Radio Reception:
- Antenna: A telescopic antenna is used for FM/SW reception. For AM, repositioning the radio is recommended.
- Automatic Channel Search: Long pressing the Play/Pause/Scan/Confirm button automatically searches, stores, and numbers channels (e.g., CH00, CH01). Alternatively, long pressing the Next or Previous buttons searches for the next available channel.
- Manual Channel Search: Channels can be tuned directly by inputting the frequency using the number buttons, followed by a short press of the Play/Pause/Scan/Confirm button or a 5-second wait. Short pressing the Next or Previous buttons also allows manual channel searching.
- Reception Improvement: For FM/SW, adjust the telescopic antenna. For AM, reposition the radio, especially indoors, by moving it closer to a window and away from electronic devices. Holding the radio can improve reception due to "Human Body Induction," but reception may weaken when hands are removed.
Channel Management:
- Saving Channels: Long press PRESET/Number Button 5, input the desired channel number, then short press Play/Pause/Scan/Confirm twice to save.
- Deleting Channels: Navigate to the desired channel, long press DEL, then short press Play/Pause/Scan/Confirm to delete.
- Navigation: Use M+ or M- buttons to choose stored channels.
Music Playing:
- TF Card Playback: Insert a TF card with MP3 or WMA files. For lyrics display, LRC files should also be present. Short press the MODE button to start playback.
- Navigation: Short press Next or Previous to select songs. Long press for fast forward or rewind.
- Pause/Play: Short press Play/Pause/Scan/Confirm.
- Direct Input: Input the serial number of a song and short press Play/Pause/Scan/Confirm to play.
- Play Mode: Short press MENU to set play modes: All, Repeat One, Repeat Folder, Random.
- Switching Modes: Long pressing Play/Pause/Scan/Confirm sets MP3/WMA playback. Short pressing AM/FM or SW switches to radio modes. Short pressing MODE returns to MP3/WMA playback.
- AUX Playback: Connect an AUX cable from the radio's AUX jack to a mobile phone or computer's earphone jack. Play music from the connected device.
- Switching Modes: Short pressing AM/FM or SW switches to radio modes. Short pressing MODE returns to AUX playback.
Recording Function:
- Requirement: A TF card is required for all recording functions.
- External Sound Recording: Short press MODE, then long press REC to start recording via the microphone. Short press REC again to finish. A TF card with MP3 files is required for this.
- AUX Recording: Connect the radio to a phone/computer via AUX, play music on the device, then long press REC to record. Short press REC again to finish.
- Radio Channel Recording: Short press AM/FM or SW to select a radio band, then long press REC to record. Short press REC again to finish.
- Recording Management:
- Pause/Resume: Short press Play/Pause/Scan/Confirm during recording.
- Playback: After recording, the radio automatically plays the recorded file. Short pressing AM/FM or SW can return to radio mode.
- Accessing Recordings: Short press REC FILE. Use Next or Previous to select, or input the serial number directly.
- Deleting Recordings: Short press REC FILE, select the file, long press DEL, then short press Play/Pause/Scan/Confirm to confirm.
Other Functions:
- Silent Mode: Short press Play/Pause/Scan/Confirm to mute the radio; a silent icon will flash. Short press again to cancel.
- Lock Button: Long press MODE to lock other buttons; a lock icon appears. Long press MODE again to unlock.
- Earphones: Plugging in earphones automatically mutes the speaker. Unplugging them returns to speaker mode. Adjust volume as needed.
Maintenance Features
- Battery Charging:
- Charge the radio if the battery icon flashes.
- First charge: 6 hours. Subsequent charges: 4 hours.
- Use a standard DC5V/0.5-2A charger.
- Charge with the radio off for optimal charging. The battery icon will flash while charging and stop flashing when fully charged. Continue charging for 1-2 hours after full charge for maximum battery power.
- Original lithium battery is recommended.
- Long-Term Storage: If not used for a long time, remove the lithium battery and charge it once a month.
- Environmental Precautions:
- Avoid getting the radio wet or using it in moist environments (e.g., rain, bathrooms, kitchens).
- Keep away from heat sources (radiators, hot water pipes, fires) and direct sunlight.
- Keep away from solvents (white spirit, paraffin, petrol).
After-Sale Service:
- QR Code Support: Scan the provided QR code to access Amazon's "Ask a question" feature for support.
- Email Support: Contact prunus-technik@hotmail.com.
- US Local Customer Support Number: (805) 712-2661.
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