1. Introduction
Welcome to the EarFun K2 Kids Bluetooth Headphones user manual. This guide provides detailed instructions on how to set up, operate, maintain, and troubleshoot your new headphones. Please read this manual carefully to ensure proper use and to maximize the lifespan of your device. The EarFun K2 headphones are designed with children's safety and comfort in mind, featuring volume limiting technology and a durable, foldable design.
2. Product Overview
The EarFun K2 Kids Bluetooth Headphones offer a blend of safety, comfort, and quality sound, specifically engineered for younger users. Key features include:
- Kids-Friendly and Comfy Material: Made with CPC-certified and RoHS2.0/FCC compliant materials, featuring soft memory foam for a cozy wearing experience.
- 85/94dB Safe Volume Limited: Protects hearing by limiting volume to WHO recommended levels.
- Bluetooth 5.4 & Hands-Free Call: Ensures stable wireless connection and clear calls with a built-in microphone.
- Balanced Stereo Sound: Equipped with 40mm drivers for clear vocals and dynamic bass.
- 40H Playtime: Ultra-long battery life for all-day use, with quick 2.5-hour USB-C recharging.
- Reliable & Foldable: Wear-resistant material and a lightweight, foldable design for easy portability.
Figure 2.1: EarFun K2 Kids Bluetooth Headphones in blue.
Figure 2.2: A young boy smiling while wearing the EarFun K2 headphones, illustrating the floating-axis design, adjustable headband, and comfortable earcups.
Figure 2.3: A child using the EarFun K2 headphones with a tablet, emphasizing the 85dB Study Mode and 95dB Travel Mode for hearing protection, along with CPC and RoHS certifications.
3. What's in the Box
Upon unboxing your EarFun K2 Kids Bluetooth Headphones, please ensure all the following items are present:
- EarFun K2 Kids Bluetooth Headphones
- User Manual
- Charging Cable (USB-C)
- 3.5mm Audio Cable
4. Setup
4.1 Charging the Headphones
Before first use, fully charge your EarFun K2 headphones. A full charge takes approximately 2.5 hours.
- Connect the USB-C charging cable to the charging port on the headphones.
- Connect the other end of the cable to a USB power adapter (not included) or a computer's USB port.
- The LED indicator will show charging status (refer to LED indicator section for details).
- Once fully charged, the LED indicator will change, and you can disconnect the cable.
Figure 4.1: The EarFun K2 headphones with an overlay indicating 40 hours of playtime and USB-C charging.
4.2 Power On/Off
- Power On: Press and hold the Power button for approximately 3 seconds until the LED indicator lights up.
- Power Off: Press and hold the Power button for approximately 3 seconds until the LED indicator turns off.
4.3 Bluetooth Pairing
To connect your EarFun K2 headphones to a Bluetooth-enabled device:
- Ensure the headphones are powered off.
- Press and hold the Power button for 5 seconds until the LED indicator flashes blue and red alternately, indicating pairing mode.
- On your device (smartphone, tablet, computer), enable Bluetooth and search for available devices.
- Select "EarFun K2" from the list of devices.
- Once connected, the LED indicator will turn solid blue.
Figure 4.2: A child using the EarFun K2 headphones with a tablet, demonstrating the stable Bluetooth 5.4 connection.
4.4 Wired Connection (3.5mm Audio Cable)
The headphones can also be used with the included 3.5mm audio cable, even if the battery is depleted.
- Plug one end of the 3.5mm audio cable into the audio jack on the headphones.
- Plug the other end into the 3.5mm audio output of your device.
- The headphones will automatically switch to wired mode.
5. Operating Instructions
5.1 Volume Control
- Volume Up: Press the "+" button.
- Volume Down: Press the "-" button.
5.2 Volume Limit Modes (85dB/94dB)
The EarFun K2 headphones feature two safe volume limit modes to protect children's hearing:
- 85dB (Study Mode): Recommended for general use and extended listening sessions.
- 94dB (Travel Mode): Provides a slightly higher volume, suitable for noisy environments like airplanes, while still remaining within safe limits.
To switch between modes: (Specific button combination not provided in data, assuming a common method)
- While the headphones are on, press and hold both the "+" and "-" buttons simultaneously for approximately 2 seconds.
- An audible prompt or LED indicator change will confirm the mode switch.
5.3 Music Playback
- Play/Pause: Press the Multi-function button (usually the power button or a dedicated play/pause button) once.
- Next Track: Press and hold the "+" button for 2 seconds.
- Previous Track: Press and hold the "-" button for 2 seconds.
5.4 Call Functions
- Answer/End Call: Press the Multi-function button once.
- Reject Call: Press and hold the Multi-function button for 2 seconds.
- Activate Voice Assistant: Triple-press the Multi-function button.
6. Maintenance and Care
To ensure the longevity and optimal performance of your EarFun K2 headphones, follow these care guidelines:
- Cleaning: Use a soft, dry cloth to wipe the headphones. Do not use harsh chemicals or abrasive materials.
- Storage: When not in use, store the headphones in a cool, dry place. Utilize their foldable design for compact storage.
- Battery Care: Avoid fully discharging the battery frequently. Charge regularly, even if not in use for extended periods, to maintain battery health.
- Avoid Extreme Conditions: Do not expose the headphones to extreme temperatures, humidity, or direct sunlight.
- Handle with Care: While durable, avoid dropping or subjecting the headphones to strong impacts.
Figure 6.1: A child folding the EarFun K2 headphones and placing them into a backpack, illustrating their lightweight and portable design for easy storage.
7. Troubleshooting
If you encounter any issues with your EarFun K2 headphones, please refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Headphones do not power on. | Low battery. | Charge the headphones fully. |
| Cannot pair with device. | Headphones not in pairing mode; Bluetooth off on device; device too far. | Ensure headphones are in pairing mode (flashing blue/red). Turn on Bluetooth on your device. Move device closer to headphones (within 10 meters). |
| No sound or low volume. | Volume too low on headphones or device; incorrect audio source; headphones not connected. | Increase volume on both headphones and device. Check if headphones are properly connected via Bluetooth or 3.5mm cable. Ensure correct audio output is selected on your device. |
| Sound distortion. | Interference; device too far; audio file quality. | Move closer to the connected device. Avoid strong electromagnetic interference. Try playing a different audio file. |
| Microphone not working. | Microphone muted on device; app permissions. | Check microphone settings on your device. Ensure the app has permission to access the microphone. |
8. Specifications
Detailed technical specifications for the EarFun K2 Kids Bluetooth Headphones:
| Feature | Detail |
|---|---|
| Model Name | EarFun K2 Kids Bluetooth Headphones |
| Connectivity Technology | Wireless (Bluetooth), Wired (3.5mm Jack) |
| Wireless Communication Technology | Bluetooth 5.4 |
| Audio Driver Type | Dynamic Driver |
| Audio Driver Size | 40 mm |
| Frequency Response | 20 Hz - 20,000 Hz |
| Sensitivity | 100 dB |
| Impedance | 32 Ohm |
| Battery Life | Up to 40 Hours |
| Charging Time | Approx. 2.5 Hours |
| Control Type | Button Control |
| Built-in Microphone | Yes |
| Volume Limit | 85dB / 94dB |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Item Weight | 175 Grams (6.2 ounces) |
| Product Dimensions | 5.83 x 3.03 x 5.12 inches |
| Age Range (Description) | Kids & Teens |
| Color | Blue |
9. Warranty and Support
EarFun provides an 18-month hassle-free protection for your EarFun K2 Kids Bluetooth Headphones, ensuring peace of mind. If you encounter any issues or have questions not covered in this manual, please contact EarFun customer support for assistance.
For further support, visit the official EarFun website or refer to the contact information provided with your product packaging. Please have your model number (EarFun K2) and purchase details ready when contacting support.
