Introduction
Thank you for choosing the EarFun K2 Kids Bluetooth Headphones. These headphones are designed with children's safety and comfort in mind, featuring volume limiting technology, durable construction, and long battery life. This manual provides detailed instructions on how to set up, operate, maintain, and troubleshoot your headphones to ensure a safe and enjoyable listening experience.

Image: EarFun K2 Kids Bluetooth Headphones, Navy Blue color variant.
Key Features
- Kids-Friendly and Comfy Material: Made from materials compliant with RoHS2.0 and FCC standards, CPC-certified, ensuring safety. Features soft memory foam headband and earpads for comfortable wear.
- 85/94dB Safe Volume Limited: Volume is limited to 85/94dB, meeting WHO recommended levels to protect children's hearing during study or travel.
- Bluetooth 5.4 & Hands-Free Call: Equipped with Bluetooth 5.4 for stable connections and a built-in microphone for clear hands-free calls, ideal for online learning or entertainment.
- Balanced Stereo Sound: 40mm drivers deliver balanced stereo sound with clear vocals and dynamic bass, promoting good listening habits.
- 40H Playtime, All Day Use: Provides up to 40 hours of battery life. Supports wired mode for continuous playback even when the battery is depleted.
- Durable & Foldable Design: Constructed from wear-resistant material, the ergonomic headband can be twisted and bent without breaking. Lightweight and foldable for easy portability.

Image: EarFun K2 headphones are qualified, safe, and trustworthy, with CPC and RoHS certifications and safe hearing protection.

Image: EarFun K2 headphones offer safe volume protection with Study Mode (85dB) and Travel Mode (94dB).
What's in the Box
Upon unboxing your EarFun K2 Kids Bluetooth Headphones, you should find the following items:
- EarFun K2 Kids Bluetooth Headphone
- User Manual (this document)
- USB-C Charging Cable
- 3.5mm Audio Cable
Product Overview
Familiarize yourself with the different parts and controls of your EarFun K2 headphones.

Image: The EarFun K2 headphones feature the latest Bluetooth 5.4 technology for a more stable connection, low power consumption, and long battery life.
Headphone Components:
- Adjustable Headband: The headband can be adjusted to 8 different levels to fit various head sizes comfortably.
- Soft Earpads: Made with soft memory foam for a comfortable and secure fit over the ears, providing sound isolation.
- Control Buttons: Located on the earcup, these buttons allow for power, volume adjustment, and call management.
- 3.5mm Audio Jack: For wired connection to devices.
- USB-C Charging Port: For recharging the built-in battery.
- Built-in Microphone: For hands-free calls and online communication.


Images: The adjustable headband and soft, comfortable earpads ensure a good fit and feel.
Setup
1. Charging the Headphones
Before first use, fully charge your EarFun K2 headphones. A full charge takes approximately 2.5 hours.
- Connect the provided USB-C charging cable to the charging port on the headphone earcup.
- Connect the other end of the USB-C cable to a USB power adapter (not included) or a computer's USB port.
- The LED indicator on the headphone will show charging status (e.g., red for charging, blue for fully charged).

Image: The EarFun K2 headphones offer up to 40 hours of playtime and are recharged via USB-C.
2. Bluetooth Pairing
Pair your headphones with your Bluetooth-enabled device (e.g., smartphone, tablet, laptop).
- Ensure the headphones are charged and turned off.
- Press and hold the Power button for 2 seconds until the LED indicator flashes blue and red, indicating pairing mode.
- On your device, go to Bluetooth settings and turn on Bluetooth.
- Search for "EarFun K2" in the list of available devices and select it to connect.
- Once connected, the LED indicator on the headphones will turn solid blue.

Image: Easy Bluetooth 5.4 connection to your devices.
3. Wired Connection (Optional)
You can also use the headphones with the included 3.5mm audio cable, which is useful when the battery is low or for devices without Bluetooth.
- Plug one end of the 3.5mm audio cable into the audio jack on the headphone.
- Plug the other end into the 3.5mm audio output of your device.
- The headphones will automatically switch to wired mode.

Image: The 3.5mm audio cable allows connection to various devices like PCs, tablets, laptops, Kindle Fire, and cell phones.
Operating Instructions
Power On/Off
- Power On: Press and hold the Power button for 2 seconds. The LED indicator will flash blue.
- Power Off: Press and hold the Power button for 3 seconds. The LED indicator will turn off.
Volume Control
- Increase Volume: Press the "+" button.
- Decrease Volume: Press the "-" button.
- The headphones are designed with an 85/94dB volume limit to protect hearing.
Music Playback
- Play/Pause: Press the Multi-function button (usually the power button or a dedicated play/pause button).
- Next Track: Press and hold the "+" button.
- Previous Track: Press and hold the "-" button.
Call Management
- Answer/End Call: Press the Multi-function button.
- Reject Call: Press and hold the Multi-function button for 2 seconds.
Maintenance and Care
To ensure the longevity and optimal performance of your EarFun K2 headphones, follow these care guidelines:
- Keep the headphones clean by wiping them with a soft, dry cloth.
- Avoid exposing the headphones to extreme temperatures, humidity, or direct sunlight.
- Do not immerse the headphones in water as they are not water-resistant.
- Store the headphones in a cool, dry place when not in use, preferably in their folded state to save space and protect them.
- Avoid dropping or subjecting the headphones to strong impacts.

Image: The lightweight and foldable design makes the headphones easy to carry for school or travel.
Troubleshooting
If you encounter any issues with your EarFun K2 headphones, please refer to the following common problems and solutions:
| Problem | Possible Solution |
|---|---|
| Headphones do not power on. | Ensure the headphones are fully charged. Connect to a power source and allow some time to charge. |
| Cannot pair with device. |
|
| No sound or low volume. |
|
| Sound distortion. | Move closer to your Bluetooth device to reduce interference. Ensure the audio file quality is good. |
| Microphone not working. | Ensure the headphones are properly connected. Check microphone settings on your device. |
Specifications
| Feature | Detail |
|---|---|
| Model Name | EarFun K2 Kids Headphones |
| Connectivity Technology | Wireless (Bluetooth), Wired (3.5mm Jack) |
| Bluetooth Version | 5.4 |
| Battery Life | Up to 40 Hours |
| Charging Time | 2.5 Hours |
| Volume Limit | 85/94 dB |
| Audio Driver Type | Dynamic Driver (40mm) |
| Frequency Range | 20 Hz - 20,000 Hz |
| Impedance | 32 Ohm |
| Sensitivity | 100 dB |
| Item Weight | 175 Grams (6.2 ounces) |
| Product Dimensions | 5.83 x 3.03 x 5.12 inches |
| Material | Composite (Kids-friendly) |
| Control Type | Button Control |
| Special Features | 40Hrs ultra long battery life & Foldable design, 40mm driver for stereo sound, 85/94dB volume limit for kids' hearing protection, Bluetooth 5.4 connection & Built-in HD microphones, Kid-friendly material, CPC-certified |
Warranty and Support
EarFun provides comprehensive support for its products.
- Warranty: We offer 18-month hassle-free protection for your EarFun K2 headphones.
- Customer Service: For any inquiries, technical support, or warranty claims, please contact EarFun customer service. You can find contact information and more resources on the official EarFun store page.
Visit the official EarFun Store for more information and support: EarFun Store





