1. Isingeniso
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. Okuqukethwe Kwephakheji
Qinisekisa ukuthi zonke izinto zikhona kuphakheji yakho:
- EarFun K4 Izingane Bluetooth Headphones
- Imaniwali yosebenzisayo
- Ikhebuli yokushaja ye-USB-C
- Ikhebula Lomsindo elingu-3.5mm
3. Izici zomkhiqizo
- Volume Limited Technology: Offers 74/85/94dBA volume limits to protect children's hearing.
- Izibani ze-LED ezinemibala: Features 5 distinct lighting modes for a visually engaging experience.
- I-High-Fidelity Stereo Sound: Equipped with 40mm drivers for clear and rich audio.
- Imakrofoni eyakhelwe ngaphakathi: Enables clear hands-free calls.
- Isikhathi sokudlala Esandisiwe: Up to 90 hours of battery life (lights off) and fast USB-C charging.
- I-Bluetooth 5.4: Provides stable and wide compatibility with various devices.
- Idizayini enethezekile: Adjustable headband, foldable structure, and soft memory foam earcups.
- Izinto Eziphephile: 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. Isethaphu kanye Noxhumano
4.1 Ukushaja ama-headphones
- Xhuma ikhebula lokushaja le-USB-C elinikeziwe embobeni yokushaja kuma-headphone.
- Xhuma enye ingxenye yentambo ku-adaptha yamandla ye-USB (ayifakiwe) noma imbobo ye-USB yekhompyutha.
- 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 Ukuvula / Ukuvula
- Vula: Press and hold the Power button for 2 seconds until the LED indicator lights up.
- Cisha ugesi: Cindezela futhi ubambe inkinobho yamandla imizuzwana emi-3 kuze kube yilapho inkomba ye-LED icima.
4.3 Ukumatanisa kwe-Bluetooth
- Qinisekisa ukuthi ama-headphone acishiwe.
- Press and hold the Power button for 5 seconds until the LED indicator flashes blue and red alternately, indicating pairing mode.
- Kudivayisi yakho (i-smartphone, ithebhulethi, i-laptop, njll.), vumela i-Bluetooth bese usesha amadivayisi atholakalayo.
- Select "EarFun K4" from the list of devices.
- Uma sesixhumekile, inkomba ye-LED izokhanya ngokuhlaza okwesibhakabhaka kancane.

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 Imodi Yezintambo
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. Iziqondiso Zokusebenza
5.1 Ukulawula ivolumu
The EarFun K4 headphones feature three volume limit settings to protect hearing:
- Imodi Ejwayelekile: 74dBA
- Study Mode: 85dBA
- Imodi Yokuhamba: 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 Izindlela Zokukhanya ze-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
- Gradient Light
- I-Quick Flash

Isithombe: A enemininingwane view of the EarFun K4 headphone's ear cup, highlighting the LED light panel and listing the five available lighting modes.
5.3 Ukudlala Umculo Nezingcingo
The control buttons on the ear cup allow for easy management of audio and calls:
- Dlala/Misa kancane: Cindezela kafushane inkinobho ye-Multi-function.
- Ithrekhi Elandelayo: Long press the "+" button for 2 seconds.
- Ithrekhi yangaphambilini: Long press the "-" button for 2 seconds.
- Phendula/Phendula ikholi: Cindezela kafushane inkinobho ye-Multi-function.
- Yenqaba Ucingo: 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. Isondlo
6.1 Ukuhlanza
- Sula ama-headphone ngendwangu ethambile neyomile.
- Ungasebenzisi izinto zokuhlanza abrasive noma izincibilikisi.
- Gwema ukuthola umswakama kunoma yiziphi izimbobo.
6.2 Isitoreji
- Gcina ama-headphone endaweni epholile, eyomile ekude nelanga eliqondile namazinga okushisa aphezulu.
- The foldable design allows for compact storage.

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. Ukuxazulula izinkinga
- Ama-headphone awavuli: Qinisekisa ukuthi ama-headphone ashajwe ngokugcwele.
- Ayikwazi ukubhanqa nedivayisi: Make sure the headphones are in pairing mode (LED flashing blue/red). Turn off and on your device's Bluetooth, then try pairing again.
- Awukho umsindo: 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.
- Izibani ze-LED azisebenzi: Check if the LED light function is enabled and cycle through the modes using the dedicated button.
- Ikhwalithi yomsindo engeyinhle: Ensure the headphones are within the Bluetooth range (up to 20 meters). Try disconnecting and reconnecting.
8. Imininingwane
| Igama Lemodeli | I-EarFun K4 |
| Ubuchwepheshe bokuxhumana | Okungenantambo (i-Bluetooth 5.4), Intambo (i-Jack engu-3.5mm) |
| Usayizi Womshayeli Womsindo | 40 mm |
| Umkhawulo Wevolumu | 74/85/94 dBA |
| Impilo Yebhethri | Up to 90 hours (lights off) |
| Isikhathi sokushaja | Imizuzu engu-10 amahora angu-8 wokudlala |
| Izici ezikhethekile | LED Lights, Built-in Microphone, Fast Charging, Foldable Design |
| Okubalulekile | Leather, Plastic (BPA-free) |
| Isisindo sento | 7.5 ama-ounces (213 amagremu) |
| Ubukhulu bomkhiqizo | 6.5 x 3.54 x 7.48 amayintshi |
9. Safety and Certifications
The EarFun K4 headphones are designed with child safety in mind:
- Ukuvikelwa kokuzwa: Volume limited to 74/85/94dBA to prevent hearing damage.
- Izinto Eziphephile: 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. Iwaranti kanye Nokusekela
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 webisayithi noma umthengisi lapho umkhiqizo wathengwa khona.