1. Folasaga
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. Mea i totonu o le afifi
Ia mautinoa o lo'o iai mea uma i lau afifi:
- EarFun K4 Kids Bluetooth Headphones
- Tusi Taiala
- USB-C Uaea Fa'atau
- 3.5mm uaea leo
3. Vaega o Oloa
- Volume Limited Technology: Offers 74/85/94dBA volume limits to protect children's hearing.
- Molī LED felanulanuai: Features 5 distinct lighting modes for a visually engaging experience.
- Leo Stereo Maualuluga: Equipped with 40mm drivers for clear and rich audio.
- Maliofoni ua fausia i totonu: Enables clear hands-free calls.
- Fa'aopoopo Taimi Ta'aloga: 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.
- Fuafuaga lelei: Adjustable headband, foldable structure, and soft memory foam earcups.
- Mea Saogalemu: 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. Seti ma So'oga
4.1 Totogiina le Headphone
- Fa'afeso'ota'i le uaea fa'avelaina USB-C ua tu'uina atu i le uafu fa'atumu i luga o mea fa'alogo.
- Fa'afeso'ota'i le isi pito o le uaea i se feso'ota'iga eletise USB (e le'o aofia ai) po'o se uafu USB a le komepiuta.
- 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 Fa'aola i luga/Pepe
- Malosiaga: Press and hold the Power button for 2 seconds until the LED indicator lights up.
- Tapē le eletise: Oomi ma uu le faamau Malosi mo le 3 sekone seia tape le faailo o le LED.
4.3 Fa'atasiga Bluetooth
- Ia mautinoa ua tapē le taliga.
- Press and hold the Power button for 5 seconds until the LED indicator flashes blue and red alternately, indicating pairing mode.
- I lau masini (telefonipoto, laupapa komepiuta feaveaʻi, komepiuta feaveaʻi, ma isi), faʻagaoioia le Bluetooth ma saili mo masini o loʻo avanoa.
- Select "EarFun K4" from the list of devices.
- O le taimi lava e feso'ota'i ai, o le a moli lemu le fa'ailoga o le LED.

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 Faiga uaea
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. Fa'atonuga o Galuega
5.1 Pulea le Volume
The EarFun K4 headphones feature three volume limit settings to protect hearing:
- Faiga masani: 74dBA
- Study Mode: 85dBA
- Faigamalaga auala: 94dBA
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 Ta'ita'i Malamalama Faiga
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
- Malamalama Gradient
- Fa'asao vave

Ata: O se auiliiliga view of the EarFun K4 headphone's ear cup, highlighting the LED light panel and listing the five available lighting modes.
5.3 Toe Ta'alo Musika ma Valaau
The control buttons on the ear cup allow for easy management of audio and calls:
- Ta'alo/Taofi: Oomi puupuu le faamau Multi-function.
- Su'ega Sosoo: Long press the "+" button for 2 seconds.
- Ala na muamua atu: Long press the "-" button for 2 seconds.
- Tali/Fa'ai'u le Valaau: Oomi puupuu le faamau Multi-function.
- Te'ena Valaau: 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. Tausiga
6.1 Fa'amamāina
- Solo le taliga i se ie vaivai ma mago.
- Aua ne'i fa'aogaina ni mea e fa'amama fa'amama po'o ni so'o.
- Aloese mai le susū i totonu o so'o se avanoa.
6.2 Teuina
- Teu le taligalu i se nofoaga mālūlū ma matutu mamao ese mai le susulu o le la ma le vevela tele.
- O le mamanu gaugau e mafai ai ona fa'atumauina le teuina.

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. Faʻafitauli
- Ua le ola taligalu: Ia mautinoa o lo'o fa'atumu atoa le taligalu.
- Le mafai ona fetaui ma le masini: Make sure the headphones are in pairing mode (LED flashing blue/red). Turn off and on your device's Bluetooth, then try pairing again.
- Leai se leo: 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.
- E le o ola moli LED: Check if the LED light function is enabled and cycle through the modes using the dedicated button.
- Le lelei leo: Ensure the headphones are within the Bluetooth range (up to 20 meters). Try disconnecting and reconnecting.
8. Fa'amatalaga
| Igoa Fa'ata'ita'iga | EarFun K4 |
| Tekinolosi Feso'ota'i | Uaealesi (Bluetooth 5.4), Uaea (3.5mm Jack) |
| Tele Avetaavale leo | 40 mm |
| Volume Tapulaʻa | 74/85/94 dBA |
| Ola ma'a | Up to 90 hours (lights off) |
| Taimi Totogi | 10 minute mo le 8 itula taimi taʻaloga |
| Fa'apitoa Fa'apitoa | LED Lights, Built-in Microphone, Fast Charging, Foldable Design |
| Mea | Leather, Plastic (BPA-free) |
| Mea mamafa | 7.5 aunese (213 kalama) |
| Fua o Mea | 6.5 x 3.54 x 7.48 inisi |
9. Safety and Certifications
The EarFun K4 headphones are designed with child safety in mind:
- Puipuiga Fa'alogo: Volume limited to 74/85/94dBA to prevent hearing damage.
- Mea Saogalemu: 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. Fa'amaonia ma Lagolago
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 webnofoaga po'o le fa'atau oloa na fa'atau ai le oloa.