PRUNUS J-288 Portable Radio User Manual

Introduction

The PRUNUS J-288 Portable Radio is a versatile audio device designed for convenience and high-quality sound. It combines traditional AM/FM radio functionality with modern features such as Bluetooth connectivity, MP3 playback via USB and TF card, and an AUX input. Its compact design and long-lasting battery make it ideal for various indoor and outdoor uses.

Figure 1: Front view of the PRUNUS J-288 Portable Radio, showing the display, control buttons, and dual speakers.

What's in the Box

PRUNUS J-288 Radio Unit
USB Charging Cable
Owner's Manual

Setup

1. Charging the Battery

The PRUNUS J-288 is equipped with a 1200mAh Li-ion rechargeable battery. Before first use, fully charge the device.

Connect the supplied USB Charging Cable to the DC5V port on the radio.
Connect the other end of the USB cable to a compatible USB power source (e.g., computer USB port, USB wall adapter).
The charging indicator light will illuminate during charging. It will turn green once fully charged.

2. Powering On/Off

To power on the radio, long press the Power button. The display will light up.
To power off the radio, long press the Power button again. The display will turn off.

Video 1: A brief overview of the PRUNUS J-288, demonstrating its compact size and basic power-on function.

Operating Modes

The PRUNUS J-288 offers multiple listening modes. Press the MODE button to cycle through available modes: AM Radio, FM Radio, Bluetooth, AUX, and USB/TF Card MP3 Player.

Universal compatibility diagram for PRUNUS J-288

Figure 2: Diagram illustrating the universal compatibility of the PRUNUS J-288 with various input sources like Bluetooth, MP3 format via flash drive, and AUX jack.

1. Radio Mode (AM/FM)

Extend the ultra-long antenna for optimal reception. The radio can auto-save up to 99 AM stations (522-1620KHZ) and 98 FM stations (87-108MHZ).

Switching Bands: Press the MODE button until "AM" or "FM" appears on the display.
Auto Scan & Store: Long press the SCAN button. The radio will automatically search for and store available stations. Stored channels will be labeled "P01", "P02", etc.
Manual Tuning: Use the numeric keypad (0-9) to directly enter a frequency (e.g., for 91.5 FM, enter "915").
Navigating Stored Channels: Use the Previous (◀◀) or Next (▶▶) buttons to cycle through stored channels.
Adjusting Volume: Use the physical volume knob on the side of the device.

Figure 3: The PRUNUS J-288 with its ultra-long antenna extended, crucial for optimal radio signal reception.

Video 2: Demonstrates how to search and store channels on the PRUNUS J-288, including auto-scan and manual tuning.

2. Bluetooth Mode

The radio features upgraded Bluetooth 4.0 technology for fast and automatic re-connection to paired devices.

Activate Bluetooth: Press the MODE button until "BLUE" appears on the display. The radio will enter pairing mode.
Pairing: On your mobile device, enable Bluetooth and search for "J-288". Select it to pair. The radio will confirm successful pairing.
Playing Audio: Once paired, play audio from your device. The radio will act as a Bluetooth speaker.
Hands-Free Calling: The radio can be used as a hands-free telephone receiver. Press the Phone button to answer or end calls.
Note: Bluetooth headphones are not supported.

PRUNUS J-288 used as a wireless Bluetooth speaker

Figure 4: The PRUNUS J-288 functioning as a wireless Bluetooth speaker, connected to a smartphone.

Video 3: Detailed demonstration of Bluetooth pairing and hands-free calling features on the PRUNUS J-288.

3. MP3 Player Mode (USB Disk & TF Card)

Enjoy your favorite music directly from a USB flash drive or TF (Micro SD) card.

Insert Media: Insert a USB flash drive into the USB port or a TF card into the TF card slot. The radio will automatically switch to MP3 mode and begin playing.
Navigating Tracks: Use the Previous (◀◀) or Next (▶▶) buttons to skip tracks.
Direct Track Selection: Use the numeric keypad (0-9) to directly select a track number.
Play/Pause: Press the Play/Pause (▶▶) button to pause or resume playback.

Video 4: Illustrates the operation of the PRUNUS J-288 in MP3 player mode using a USB flash drive.

4. AUX Input Mode

Connect external audio devices using a 3.5mm AUX cable (not included).

Switch to AUX Mode: Press the MODE button until "AUX" appears on the display.
Connect Device: Insert one end of a 3.5mm AUX cable into the radio's AUX port and the other end into your external audio device's headphone jack or AUX output.
Play Audio: Play audio from your external device. The radio will output the sound.

Video 5: Shows how to connect and play audio through the AUX input on the PRUNUS J-288.

Special Features

1. Sleep Timer

Set a shutdown time for the radio, perfect for falling asleep to music or radio programs.

Press the CLOCK button (often indicated by a clock icon).
Repeatedly press the CLOCK button to cycle through preset shutdown times (e.g., 15, 30, 60, 90, 120 minutes).
The radio will automatically power off after the selected time.

Figure 5: The PRUNUS J-288 displaying its sleep timer function, allowing users to set an automatic shutdown time.

2. Lock Key

Prevent accidental operation by locking the radio's buttons.

Long press the Lock button (indicated by a padlock icon). The display will show "LOCK".
All buttons, except the Power button, will be disabled.
To unlock, long press the Lock button again.

Specifications

Product Dimensions	0.8 x 7 x 2.3 inches
Item Weight	10.8 ounces
Item Model Number	J-288
Batteries	1 Lithium Ion battery (included)
Frequency Range (AM)	522-1620 KHZ
Frequency Range (FM)	87-108 MHZ
Connectivity Technology	Bluetooth 4.0, AUX, USB, TF Card
Speaker Output	Dual 3W magnetic speakers
Display Technology	LED (Power-saving AOD screen)

PRUNUS J-288 size comparison to iPhone 6s Plus

Figure 6: Size comparison of the PRUNUS J-288 to an iPhone 6s Plus, highlighting its compact and portable dimensions.

Maintenance

Keep the device dry and away from moisture.
Clean the exterior with a soft, dry cloth. Do not use harsh chemicals or abrasive cleaners.
Avoid dropping the device or subjecting it to strong impacts.
When not in use for extended periods, store the radio in a cool, dry place and charge it periodically to maintain battery health.

Troubleshooting

No Power: Ensure the battery is charged. Connect the USB charging cable and try powering on again.
Poor Radio Reception: Fully extend the antenna. Try repositioning the radio for better signal. Perform an auto-scan to find stronger stations.
Bluetooth Pairing Issues: Ensure the radio is in "BLUE" mode. Turn off and on Bluetooth on your mobile device. Make sure no other devices are currently paired with the radio.
No Sound from USB/TF Card: Ensure the media is inserted correctly. Verify that the audio files are in a compatible MP3 format.
Display is Dim Outdoors: The power-saving AOD screen may appear dim in bright sunlight. This is normal behavior to conserve battery.

Warranty & Support

PRUNUS offers a 100% Customer Satisfaction Guarantee, including LIFETIME hassle-FREE exchange and refund for the radio body, and 60 days for radio accessories. For any questions or support, please contact PRUNUS customer service.

For further assistance, please refer to the official PRUNUS website or contact their support channels.

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PRUNUS J-288