1. Product Overview
The keephifi BLON BL01 In-Ear Headphones are designed to deliver high-fidelity audio. They feature a 10mm bio-fiber diaphragm for detailed sound reproduction and a durable zinc alloy cavity. The detachable 2-pin cable allows for easy replacement and customization.

Image 1.1: Overview of the keephifi BLON BL01 In-Ear Headphones, showing the earpieces, braided cable, and L-shaped 3.5mm audio jack.
Package Contents:
- BLON BL01 In-Ear Headphones (Left and Right earpieces)
- Detachable 2-pin 0.78mm cable with 3.5mm L-shaped gold-plated plug
- Assorted ear tips (various sizes)
- User Manual (this document)
2. Setup Instructions
2.1 Attaching the Cable
- Identify the left (L) and right (R) earpieces and the corresponding connectors on the cable. The earpieces are typically marked on their inner surface.
- Align the 2-pin connector on the cable with the receptacle on the earpiece. Ensure the pins are correctly oriented.
- Gently push the cable connector into the earpiece receptacle until it is securely seated. Do not force the connection.
- Repeat for the other earpiece.

Image 2.1: Detailed view of the BLON BL01 earpiece, highlighting the 2-pin detachable cable connection point and the ear-hook design.
2.2 Selecting and Installing Ear Tips
Proper ear tip selection is crucial for comfort, sound quality, and noise isolation.
- Experiment with the different sizes of ear tips provided.
- Gently remove the pre-installed ear tips by pulling them off the nozzle.
- Select a new ear tip size and push it onto the earpiece nozzle until it is firmly attached.
- Test different sizes to find the best fit that creates a good seal in your ear canal.

Image 2.2: Illustration demonstrating the importance of selecting the correct ear tip size for a secure and comfortable fit, ensuring optimal sound and noise isolation.
3. Operating Instructions
3.1 Wearing the Earphones
- Insert the earpieces into your ear canals.
- Guide the cable over and behind your ears, utilizing the ear-hook design for stability.
- Adjust the earpieces until they feel comfortable and form a good seal.
3.2 Connecting to an Audio Source
Plug the 3.5mm L-shaped gold-plated jack into the headphone port of your audio device (e.g., smartphone, tablet, computer, digital audio player).
3.3 Using the In-line Microphone and Controls (if applicable)
If your BLON BL01 model includes an in-line microphone and controls, use them as follows:

Image 3.1: Illustration of the in-line remote control functions, including buttons for answering/hanging up calls, rejecting calls, and playing/pausing audio.
- Short Press: Answer incoming calls or play/pause music.
- Press Again: Hang up an active call.
- Long Press: Reject an incoming call.
Note: The specific functionality of in-line controls may vary depending on your audio source device.
4. Maintenance and Care
- Cleaning: Regularly clean the earpieces and ear tips with a soft, dry cloth. For ear tips, you may use a slightly damp cloth with mild soap, then rinse and dry thoroughly before reattaching.
- Cable Care: Avoid sharp bends or excessive pulling on the cable. When detaching, always grip the connector, not the cable itself.
- Storage: Store the earphones in a clean, dry place, preferably in a protective case, when not in use to prevent damage.
- Avoid Moisture: Do not expose the earphones to water or excessive humidity.
- Temperature: Avoid extreme temperatures.
5. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound or low volume |
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| Sound distortion |
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| Earphones fall out easily |
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6. Specifications
| Feature | Detail |
|---|---|
| Driver Unit | 10mm Bio-Fiber Diaphragm |
| Frequency Response | 20Hz-20KHz |
| Sensitivity | 102dB |
| Impedance | 16Ω |
| Plug Type | 3.5mm L-shaped gold-plated |
| Interface | 2Pin 0.78mm |
| Wire Length | 1.2m |
| Cavity Material | Zinc Alloy |
| Wearing Method | Ear-hook (detachable cable) |
| Item Weight | 128 Grams (4.5 ounces) |
7. Warranty and Support
keephifi offers a one-year warranty for the BLON BL01 In-Ear Headphones from the date of purchase. This warranty covers manufacturing defects under normal use.
For warranty claims, technical support, or any inquiries, please contact keephifi customer service. You can reach us via our official website or through the retailer where you purchased the product.
Customer Support:
- Response Time: Within 24 hours.
- Contact Information: Refer to your purchase documentation or the keephifi official website for the most current contact details.