OTL Technologies HP0663
OTL Technologies Harry Potter Face Core Headphones User Manual - Model HP0663
Your guide to setup, operation, and maintenance.
1. Introduction
Thank you for choosing the OTL Technologies Harry Potter Face Core Headphones. These wired on-ear headphones are designed for children, featuring a unique Harry Potter Face Core style. This manual provides essential information for the safe and effective use of your headphones, including setup, operation, maintenance, and troubleshooting.
Please read this manual thoroughly before using the product and retain it for future reference.
2. Important Safety Information
- Hearing Protection: To prevent possible hearing damage, do not listen at high volume levels for long periods.
- Traffic Safety: Do not use headphones while driving, cycling, or walking in traffic, as this may distract you and cause an accident.
- Choking Hazard: This product contains small parts and is not suitable for children under 3 years of age. Keep packaging materials away from children.
- Cleaning: Clean only with a dry, soft cloth. Do not use liquid cleaners or aerosols.
- Water Exposure: Do not expose the headphones to water or excessive moisture.
- Temperature: Avoid extreme temperatures. Do not leave the headphones in direct sunlight or in very cold environments.
3. Package Contents
Ensure all items are present in the package:
- OTL Technologies Harry Potter Face Core Headphones (Model HP0663)
- User Manual (this document)

Image 1: The OTL Technologies Harry Potter Face Core Headphones shown in their retail packaging, featuring Harry Potter branding and a clear window displaying the headphones.
4. Setup
4.1 Connecting the Headphones
- Locate the 3.5mm audio jack on your device (e.g., smartphone, tablet, laptop, gaming console controller).
- Insert the 3.5mm connector from the headphones firmly into the audio jack of your device.
- Ensure the connection is secure to prevent audio interruptions.
4.2 Adjusting the Fit
- Gently place the earcups over your ears.
- Adjust the headband by sliding the earcups up or down until they rest comfortably on your ears and the headband fits securely over your head.
- The earcups are designed to sit on-ear for a comfortable fit for children.

Image 2: An angled view of the OTL Technologies Harry Potter Face Core Headphones, highlighting the adjustable headband and the Harry Potter face design on the earcups.
5. Operating the Headphones
5.1 Audio Playback
- Once connected, begin playing audio from your device.
- Adjust the volume directly on your connected device to a comfortable listening level. These headphones do not feature integrated volume controls.
5.2 Compatibility
These headphones are multi-platform compatible and can be used with various devices that have a 3.5mm audio jack, including:
- Desktop computers
- Tablets
- Mobile phones
- Laptops
- Music production equipment
- Car audio systems (with 3.5mm input)

Image 3: A direct front view of one earcup of the OTL Technologies Harry Potter Face Core Headphones, clearly showing the Harry Potter face design and the 'Hp' logo on the headband pivot.
6. Maintenance and Care
6.1 Cleaning
- Wipe the headphones with a soft, dry, lint-free cloth.
- Do not use abrasive cleaners, solvents, or chemical agents, as these may damage the surface or components.
- Ensure no moisture enters the earcup grilles or the 3.5mm jack.
6.2 Storage
- When not in use, store the headphones in a clean, dry place, away from direct sunlight and extreme temperatures.
- Avoid tangling the cable by coiling it loosely.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound or low volume |
|
|
| Sound distortion or poor quality |
|
|
| Headphones are uncomfortable |
|
|
8. Specifications
| Brand | OTL Technologies |
| Model | HP0663 |
| Style | Harry Potter Face Core |
| Connectivity Technology | Wired |
| Headphone Jack | 3.5mm Jack |
| Ear Placement | On-Ear |
| Material | Leather (ear cushions) |
| Compatible Devices | Desktop, Tablet, Mobile Phones, Laptop, Music Production Equipment, Car Audio Systems |
| Product Dimensions | 17 x 17 x 6.5 cm |
| Item Weight | 1 Gram |
| Age Range (Description) | Children |
| Noise Control | None |
9. Warranty Information
OTL Technologies products are manufactured to high standards and are warranted against defects in materials and workmanship. For specific warranty terms and conditions, please refer to the warranty card included with your purchase or visit the official OTL Technologies website. Please retain your proof of purchase for warranty claims.
10. Customer Support
If you encounter any issues not covered in this manual or require further assistance, please contact OTL Technologies customer support. You can typically find contact information on the product packaging or on the official OTL Technologies website.
Website: www.otltechnologies.com (Please note: This is a placeholder URL. Refer to your product packaging for the exact support website.)
Ask a question about this manual
Ask about setup, troubleshooting, compatibility, parts, safety, or missing instructions. Manuals+ will review the question and use this page’s manual context to help answer it.
