Introduction
This manual provides detailed instructions for the idoooz MP3 Player with Built-in 16 GB Memory and Bluetooth Headphone. This all-in-one device combines an MP3 player with wireless Bluetooth headphones, offering lossless sound quality and a comfortable design suitable for various activities like running, gym workouts, and jogging. Please read this manual thoroughly before using the device to ensure proper operation and longevity.
What's in the Box
Upon opening the package, please verify that all the following items are included:
- 1x S4 Mp3 Bluetooth earbud
- 1 x USB data cable
- 3 types of earplugs (large, medium, and small)
- 1 x User Manual

Image: All components included in the idoooz MP3 Player package.
Product Overview and Controls
Familiarize yourself with the various buttons and interfaces on your idoooz MP3 Player for optimal use.

Image: Detailed diagram of the idoooz MP3 Player's controls and interfaces.
The device features dedicated buttons for power, playback control, volume adjustment, and mode switching. The data transfer and charging interface is located conveniently for easy access.
Video: An overview of the idoooz MP3 Player, demonstrating its components and basic functions, including button layout and initial setup.
Setup
Charging the Device
Before first use, fully charge your idoooz MP3 Player. Connect the provided USB data cable to the charging interface on the device and plug the other end into a USB power source (e.g., computer USB port or wall adapter). The indicator light will show charging status and turn off when fully charged.
Transferring Music (MP3 Mode)
The idoooz MP3 Player has a built-in 16 GB memory for storing your music and audiobooks. To transfer files:
- Connect the device to your computer using the USB data cable.
- The device will appear as a removable disk drive on your computer.
- Simply drag and drop your desired MP3, WMA, FLAC, or APE audio files directly into the device's storage.
- Safely eject the device from your computer once the transfer is complete.

Image: The idoooz MP3 Player highlighting its 16GB built-in memory capacity.
Operating Instructions
Power On/Off and Play/Pause
- To power on the device, press and hold the power button (refer to Product Overview diagram).
- To power off the device, press and hold the power button again.
- While playing music, press the power button once to play or pause the current track.
Switching Between Memory Mode and Bluetooth Mode
The device supports two operating modes: internal memory playback and Bluetooth connection. Press the 'M' button (Mode button) to switch between these two modes.
- In Memory Mode, the device will play music directly from its built-in 16GB storage.
- In Bluetooth Mode, the device will be discoverable for pairing with your smartphone or other Bluetooth-enabled devices.
Adjusting Volume and Changing Tracks
- Press the Volume + button to increase the volume.
- Press the Volume - button to decrease the volume.
- To go to the next track, long press the Volume + button for 2 seconds.
- To go to the previous track, long press the Volume - button for 2 seconds.
Connecting via Bluetooth
To connect your idoooz MP3 Player to a smartphone or other Bluetooth device:
- Ensure the idoooz MP3 Player is powered on and in Bluetooth Mode (press 'M' button if necessary). The indicator light will flash, indicating it's in pairing mode.
- On your smartphone or Bluetooth device, go to the Bluetooth settings.
- Turn on Bluetooth.
- Search for available devices. The idoooz MP3 Player should appear as "S4".
- Select "S4" to pair. Once connected, the indicator light will stop flashing and remain solid.
Once paired, you can play audio from your connected device through the idoooz headphones and manage calls directly.

Image: The idoooz MP3 Player in use during a run, highlighting its suitability for sports.

Image: The idoooz MP3 Player worn during a gym workout, emphasizing its secure fit.
Maintenance and Care
To ensure the longevity and optimal performance of your idoooz MP3 Player, follow these care guidelines:
- Cleaning: Wipe the device with a soft, dry cloth. Avoid using harsh chemicals or abrasive materials.
- Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures. The flexible memory wire allows for easy storage without tangling.
- Sweat Resistance: The idoooz MP3 Player features a sweat-proof sports design. While it is designed to withstand sweat during workouts, avoid submerging it in water or exposing it to heavy rain.
- Earplugs: Regularly clean the earplugs to maintain hygiene and sound quality. Replace them if they become worn or damaged.

Image: The idoooz MP3 Player demonstrating its sweat-proof capabilities.
Troubleshooting
If you encounter any issues with your idoooz MP3 Player, please refer to the following table for common problems and their solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Low battery. | Charge the device fully using the provided USB cable. |
| Cannot connect via Bluetooth. | Device not in pairing mode; Bluetooth off on phone; device too far. | Ensure device is in Bluetooth mode (flashing light). Turn on phone's Bluetooth. Keep devices within range (approx. 10 meters). Try restarting both devices. |
| Computer does not recognize the device. | Faulty USB cable; driver issue; incorrect connection. | Try a different USB port or cable. Ensure the device is powered on. Check computer's device manager for driver issues. |
| No sound or low volume. | Volume too low; incorrect mode; earplugs not fitted correctly. | Increase volume on the device and connected phone. Ensure you are in the correct mode (Memory or Bluetooth). Adjust earplugs for a secure fit. |
| Buttons are unresponsive. | Temporary software glitch; physical damage. | Try restarting the device. If the issue persists, contact customer support. |
Product Specifications
- Brand: idoooz
- Model Name: mp3 player with bluetooth (S4)
- Memory Storage Capacity: 16 GB
- Connectivity Technology: Bluetooth, USB
- Color: Black
- Screen Size: 1.44 inches
- Special Feature: Sweat-proof, USB connectivity, sports-and-exercise, wireless
- Item Weight: 3.77 ounces
- Package Dimensions: 6.14 x 5.31 x 1.65 inches
- Manufacturer: Shenzhen shi hui sheng xing ke ji you xian gong si
- Date First Available: October 9, 2021

Image: Internal components of the idoooz MP3 Player earbud.
Warranty and Support
For any questions, concerns, or technical assistance regarding your idoooz MP3 Player, please contact our customer service. Our team is dedicated to providing friendly and prompt support to ensure your satisfaction.
Please refer to your purchase documentation for specific warranty details and contact information.





