1. Introduction
Thank you for choosing the Gracioso Portable Cassette Player Recorder Converter, Model CR381. This device allows you to enjoy your cassette tape collection, convert tapes to MP3 format on an SD card, play MP3/WAV files from an SD card, and record audio using the built-in microphone. This manual provides detailed instructions for setup, operation, maintenance, and troubleshooting to ensure optimal performance and longevity of your device.
2. Product Overview
2.1 Package Contents
- Gracioso Portable Cassette Player Recorder Converter (Model CR381)
- 16GB SD Card
- USB Charging Cable
- User Manual

Image: The Gracioso CR381 cassette player, a 16GB SD card, USB charging cable, and user manual, illustrating the complete package contents.
2.2 Device Features
- Cassette Playback: Enjoy your audio cassette tapes.
- Cassette to MP3 Conversion: Convert analog cassette audio directly to MP3 files on an SD card without a computer.
- SD Card Playback: Play MP3/WAV audio files stored on an SD card.
- Voice Recording: Record audio via the built-in microphone directly to an SD card.
- Rechargeable Battery: Integrated 1000mAh battery for portable use.
- Built-in Speaker: For direct audio output.
- Headphone Jack: 3.5mm stereo output for private listening.
- Digital Display: Shows battery level, playback status, and track information.

Image: The Gracioso CR381 portable cassette player, black in color, with a cassette tape visible inside and a USB stick with a Micro SD card shown above it.
3. Setup
3.1 Charging the Battery
The device is equipped with a 1000mAh rechargeable Lithium-Ion battery. Before first use, fully charge the device.
- Connect the included USB charging cable to the device's charging port.
- Connect the other end of the USB cable to a standard USB power adapter (not included) or a computer's USB port.
- The digital display will indicate charging status. A full charge takes approximately 2 hours.
- Once fully charged, the device can provide approximately 7 hours of playback time.

Image: The Gracioso CR381 cassette player with a visual representation of its 1000mAh rechargeable battery and charging/playback times (2h charge, 7-20h use).
3.2 Inserting an SD Card
An SD card is required for MP3 playback, recording, and tape conversion.
- Locate the SD card slot on the side of the device.
- Insert the included 16GB SD card (or another compatible SD card) into the slot with the metal contacts facing down, until it clicks into place.
- To remove, gently push the SD card inward until it springs out.
3.3 Inserting a Cassette Tape
- Press the 'OPEN' button or slide the cassette door latch to open the cassette compartment.
- Insert a cassette tape with the open side facing the playback head.
- Close the cassette compartment door firmly until it clicks.
4. Operating Instructions
4.1 Power On/Off
Slide the 'ON/OFF' switch located on the side of the device to power it on or off.
4.2 Cassette Playback
- Ensure a cassette tape is properly inserted.
- Press the 'PLAY' button. The tape will begin to play.
- Adjust the volume using the 'VOL' dial on the side of the device.
- To stop playback, press the 'STOP' button.
- Use the 'F.REW' (Fast Rewind) and 'F.FWD' (Fast Forward) buttons to navigate the tape.

Image: An open view of the Gracioso CR381 cassette player, highlighting the high-quality cassette head and motor for stable tape playback.
4.3 Cassette to MP3 Conversion
This feature allows you to convert your cassette tapes directly to MP3 files on an SD card.
- Ensure an SD card is inserted and has sufficient free space.
- Insert the cassette tape you wish to convert.
- Press the 'PLAY' button to start the tape playback.
- Press the 'REC' (Record) button (often indicated by a red dot or similar icon). The device will begin converting the playing audio to an MP3 file on the SD card.
- To stop recording, press the 'REC' button again or the 'STOP' button.
- The converted MP3 files will be saved on the SD card. You can then transfer these files to a computer using the included USB stick (SD card adapter) or play them directly on the device.

Image: A step-by-step visual guide demonstrating how to convert a cassette tape to MP3 format on an SD card using the Gracioso CR381, including inserting tape and SD card, playing, and pressing record.
4.4 Recording Voice to SD Card
The built-in microphone allows for direct voice recording.
- Ensure an SD card is inserted.
- Press the 'REC' button. The device will start recording audio from its built-in microphone to an MP3 file on the SD card.
- To stop recording, press the 'REC' button again or the 'STOP' button.

Image: The Gracioso CR381 cassette player shown recording voice, with a visual representation of sound waves and an SD card icon, indicating direct recording to the card.
4.5 SD Card Music Playback
Play MP3/WAV files stored on your SD card.
- Ensure an SD card with audio files is inserted.
- The device will automatically switch to SD card mode or you may need to press a 'MODE' button (if available, refer to device markings).
- Use the playback control buttons (Play/Pause, Next Track, Previous Track) to navigate and play your music.
- Adjust the volume using the 'VOL' dial.
4.6 Using Headphones
For private listening, connect 3.5mm headphones to the headphone jack located on the side of the device. The built-in speaker will automatically mute when headphones are connected.
4.7 Digital Screen Display
The digital screen displays important information such as battery level, current playback mode, and track duration/number during SD card playback.

Image: A close-up view of the Gracioso CR381's digital screen display, showing the time '02:36', battery indicator, and SD card icon, indicating playback status.
5. Maintenance
5.1 General Care
- Keep the device clean and free from dust. Use a soft, dry cloth for cleaning.
- Avoid exposing the device to extreme temperatures, direct sunlight, or high humidity.
- Do not drop or subject the device to strong impacts.
5.2 Cassette Head Cleaning
Periodically clean the cassette playback head and pinch rollers to ensure optimal sound quality and prevent tape damage.
- Open the cassette compartment.
- Using a cotton swab lightly dampened with isopropyl alcohol, gently clean the playback head, capstan, and pinch rollers.
- Allow components to dry completely before inserting a tape.
5.3 Battery Care
- Charge the battery regularly, even if the device is not used frequently, to maintain battery health.
- Avoid completely draining the battery before recharging.
6. Troubleshooting
If you encounter issues with your Gracioso CR381, please refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Battery is depleted. | Charge the device for at least 2 hours. |
| Cassette tape does not play or sound is distorted. | Tape not inserted correctly; dirty playback head; damaged tape. | Ensure tape is fully inserted. Clean the playback head and pinch rollers. Try a different tape. |
| SD card not recognized or recording fails. | SD card not inserted correctly; SD card is full or corrupted; incompatible SD card. | Reinsert the SD card. Check if the SD card has free space. Try formatting the SD card (this will erase all data). Use a different SD card. |
| No sound from headphones. | Headphones not fully plugged in; faulty headphones; volume too low. | Ensure headphones are fully inserted into the 3.5mm jack. Test with another pair of headphones. Increase the volume. |
| Poor sound quality from speaker. | Volume too high (distortion); speaker obstruction; low quality audio source. | Adjust volume. Ensure speaker grille is not blocked. Check the quality of the cassette or MP3 file. |
7. Specifications
- Model: CR381
- Product Dimensions: 4.76 x 3.61 x 1.56 inches
- Item Weight: 11.3 ounces
- Battery: 1000mAh Lithium Ion (included)
- Charging Time: Approximately 2 hours
- Playback Time: Approximately 7 hours
- Audio Output: Built-in speaker, 3.5mm headphone jack
- Recording Format: MP3 (to SD card)
- Playback Formats: Cassette, MP3, WAV (from SD card)

Image: The Gracioso CR381 portable cassette player with its dimensions labeled: 4.76 inches length, 3.61 inches width, 1.56 inches height, and a weight of 0.49 lbs.
8. Warranty and Support
Gracioso offers a lifetime warranty for the Portable Cassette Player Recorder Converter Model CR381. For any issues or inquiries, please contact our customer service team. We are committed to providing 24/7 customer support to ensure your satisfaction.
For support, please refer to the contact information provided with your product packaging or visit the official Gracioso website.

