1. Introducció
Thank you for choosing the EarFun K4 Kids Bluetooth Headphones. This manual provides essential information for setting up, operating, and maintaining your headphones. Please read it thoroughly to ensure proper use and to maximize your listening experience.

Image: The EarFun K4 Kids Bluetooth Headphones in blue, showcasing their over-ear design and LED light feature.
2. Contingut del paquet
Assegureu-vos que tots els elements estiguin presents al vostre paquet:
- Auriculars Bluetooth EarFun K4 Kids
- Manual d'usuari
- Cable de càrrega USB-C
- Cable d'àudio de 3.5 mm
3. Característiques del producte
- Volume Limited Technology: Offers 74/85/94dBA volume limits to protect children's hearing.
- Llums LED de colors: Features 5 distinct lighting modes for a visually engaging experience.
- So estèreo d'alta fidelitat: Equipped with 40mm drivers for clear and rich audio.
- Micròfon integrat: Permet trucades de mans lliures nítides.
- Temps de joc ampliat: Up to 90 hours of battery life (lights off) and fast USB-C charging.
- Bluetooth 5.4: Provides stable and wide compatibility with various devices.
- Disseny còmode: Adjustable headband, foldable structure, and soft memory foam earcups.
- Materials segurs: Constructed with BPA-free materials, certified by RoHS 2.0 and CPC standards.

Image: A visual summary of the EarFun K4 headphones' key features, including volume limits, LED lights, sound quality, microphone, battery life, Bluetooth version, and foldable design.
4. Configuració i connexió
4.1 Càrrega dels auriculars
- Connecteu el cable de càrrega USB-C proporcionat al port de càrrega dels auriculars.
- Connecteu l'altre extrem del cable a un adaptador de corrent USB (no inclòs) o al port USB d'un ordinador.
- The LED indicator will show charging status. A full charge provides up to 90 hours of playtime with lights off, or approximately 24 hours with lights on. A 10-minute charge provides about 8 hours of playtime.

Image: Illustration of the EarFun K4 headphones' battery life, highlighting 90 hours of wireless use (with lights off) and unlimited playtime in wired mode.
4.2 Engegada/apagada
- Encès: Press and hold the Power button for 2 seconds until the LED indicator lights up.
- Apagar: Manteniu premut el botó d'engegada durant 3 segons fins que l'indicador LED s'apagui.
4.3 Vinculació Bluetooth
- Assegureu-vos que els auriculars estiguin apagats.
- Press and hold the Power button for 5 seconds until the LED indicator flashes blue and red alternately, indicating pairing mode.
- Al dispositiu (telèfon intel·ligent, tauleta, ordinador portàtil, etc.), activeu el Bluetooth i cerqueu els dispositius disponibles.
- Select "EarFun K4" from the list of devices.
- Un cop connectat, l'indicador LED parpellejarà blau lentament.

Image: The EarFun K4 headphones demonstrating universal compatibility with smartphones, tablets, laptops, PCs, gaming consoles, and other devices, powered by Bluetooth 5.4 technology.
4.4 Mode amb cable
To use the headphones in wired mode, connect the provided 3.5mm audio cable to the headphone's audio jack and the other end to your device's audio output. This mode does not require battery power.
5. Instruccions de funcionament
5.1 Control de volum
The EarFun K4 headphones feature three volume limit settings to protect hearing:
- Mode normal: XNUMxdBA
- Study Mode: XNUMxdBA
- Mode de viatge: XNUMxdBA
To switch between volume limit modes, simultaneously press the "+" and "-" buttons once after pairing.

Image: Three children demonstrating the use of EarFun K4 headphones in different environments, illustrating the 74dBA (Normal), 85dBA (Study), and 94dBA (Travel) volume limit settings designed for hearing protection.

Image: A diagram illustrating the simultaneous press of the '+' and '-' buttons on the EarFun K4 headphones to cycle through the different volume limit modes.
5.2 modes de llum LED
The headphones feature 5 colorful LED lighting modes. Use the dedicated LED light button to cycle through the modes:
- Static Color 1
- Static Color 2
- Static Color 3
- Llum degradada
- Flash ràpid

Imatge: Una imatge detallada view of the EarFun K4 headphone's ear cup, highlighting the LED light panel and listing the five available lighting modes.
5.3 Reproducció de música i trucades
The control buttons on the ear cup allow for easy management of audio and calls:
- Reproduir/pausa: Premeu breument el botó multifunció.
- Pista següent: Premeu llargament el botó "+" durant 2 segons.
- Pista anterior: Premeu llargament el botó "-" durant 2 segons.
- Respondre/Finalitzar la trucada: Premeu breument el botó multifunció.
- Rebutja la trucada: Long press the Multi-function button for 2 seconds.

Image: A child wearing EarFun K4 headphones, with an accompanying diagram detailing the location and function of the control buttons for LED lights and audio playback/calls.
6. Manteniment
6.1 Neteja
- Netegeu els auriculars amb un drap suau i sec.
- No utilitzeu netejadors abrasius ni dissolvents.
- Eviteu que entri humitat a cap obertura.
6.2 Emmagatzematge
- Guardeu els auriculars en un lloc fresc i sec, allunyat de la llum solar directa i de temperatures extremes.
- El disseny plegable permet un emmagatzematge compacte.

Image: A child wearing the EarFun K4 headphones, with callouts emphasizing the adjustable headband, foldable structure, soft memory foam earcups, and durable materials for all-day comfort.

Image: The EarFun K4 headphones in their folded state, placed next to a backpack and books, demonstrating their compact and portable design suitable for travel and storage.
7. Solució De Problemes
- Els auriculars no s'encenen: Assegureu-vos que els auriculars estiguin completament carregats.
- No es pot emparellar amb el dispositiu: Make sure the headphones are in pairing mode (LED flashing blue/red). Turn off and on your device's Bluetooth, then try pairing again.
- Sense so: Check the volume level on both the headphones and your connected device. Ensure the headphones are properly connected via Bluetooth or the 3.5mm audio cable.
- Els llums LED no funcionen: Check if the LED light function is enabled and cycle through the modes using the dedicated button.
- Mala qualitat del so: Ensure the headphones are within the Bluetooth range (up to 20 meters). Try disconnecting and reconnecting.
8. Especificacions
| Nom del model | EarFun K4 |
| Tecnologia de connectivitat | Sense fil (Bluetooth 5.4), amb cable (connector de 3.5 mm) |
| Mida del controlador d'àudio | 40 mm |
| Límit de volum | 74/85/94 dBA |
| Durada de la bateria | Fins a 90 hores (amb els llums apagats) |
| Temps de càrrega | 10 minuts durant 8 hores de joc |
| Característiques especials | LED Lights, Built-in Microphone, Fast Charging, Foldable Design |
| Material | Leather, Plastic (BPA-free) |
| Pes de l'article | 7.5 unces (213 grams) |
| Dimensions del producte | 6.5 x 3.54 x 7.48 polzades |
9. Safety and Certifications
The EarFun K4 headphones are designed with child safety in mind:
- Protecció auditiva: Volume limited to 74/85/94dBA to prevent hearing damage.
- Materials segurs: Made with BPA-free materials and certified by RoHS 2.0 and CPC standards.

Image: The EarFun K4 headphones prominently displaying their RoHS, CPC (Children's Product Certificate), and BPA Free certifications, emphasizing their construction from safe, child-friendly materials.

Image: A graph illustrating safe listening levels and zones, accompanied by World Health Organization (WHO) recommendations for protecting children's hearing from prolonged exposure to high decibel levels.
10. Garantia i Suport
EarFun provides an 18-month hassle-free protection for the K4 Kids Bluetooth Headphones. For any product inquiries, technical support, or warranty claims, please contact EarFun customer service through their official weblloc web o el venedor on es va comprar el producte.





