1. Introduction
This manual provides detailed instructions for the use and maintenance of your KHwatch RM670 HiFi Wired Earphone Headset. Designed for high-fidelity audio, clear calls, and comfortable wear, these earphones are compatible with both 3.5mm and Type-C devices. Please read this manual thoroughly before using the product to ensure optimal performance and longevity.
2. Package Contents
Please check the box for the following items:
- 1 x KHwatch RM670 Wired Earphone Headset
- 1 x User Manual
- 2 x Pairs of Replacement Silicone Ear Tips (various sizes)
3. Setup and Connection
3.1 Choosing Ear Tips
Select the ear tips that best fit your ears. Proper fitting ear tips are crucial for comfort, sound quality, and effective noise isolation. Gently insert the earphones into your ear canal, ensuring a snug and comfortable seal.
3.2 Connecting to Your Device
The RM670 earphones come with either a 3.5mm jack or a Type-C connector, depending on the model purchased. Connect the appropriate plug to your device's audio port.
4. Operating Instructions
The earphones feature an in-line control button for easy management of music playback and calls.
- Play/Pause Music: Press the control button once.
- Answer/Hang Up Calls: Press the control button once.
- Next Track: Press the control button twice.
- Previous Track: Press the control button three times.
5. Specifications
| Parameter | Value |
|---|---|
| Product Model | RM-670 |
| Frequency Response | 20Hz-20KHz |
| Output Sensitivity | 105±3dB |
| Microphone Sensitivity | (-42)±3dB |
| Impedance | 16Ω |
| Rated Power | 3mW |
| Driver Unit | 10mm |
| Pin Type | 3.5mm / Type-C |
| Cable Length | 1.2m |
| Net Weight | Approx. 13-13.5g |
| Material | Silica Gel |
| Features | With microphone, Active Noise Cancelling, Sound Isolating, Volume Control, Control Button |
| Style | Wired in-ear headphones |
| Certification | CE, FCC |
6. Maintenance and Care
- Clean the ear tips regularly with a soft, dry cloth to prevent wax buildup and maintain hygiene.
- Store the earphones in a clean, dry place away from direct sunlight, high temperatures, excessive dust, and humidity. These conditions can damage the product's wiring and components.
- Avoid tangling the cable to prevent damage.
7. Troubleshooting
If you experience issues with your earphones, consider the following:
- No Sound: Ensure the earphone plug is fully inserted into your device's audio port. Check your device's volume settings.
- Poor Sound Quality: Verify that the ear tips are properly seated in your ears to create a good seal. Try different sized ear tips. Ensure the audio source is of good quality.
- Microphone Not Working: Check if the microphone is obstructed. Ensure your device's settings are configured to use the earphone's microphone.
8. User Tips
8.1 Earphone Burn-in
To achieve optimal sound performance, it is recommended to "burn-in" your earphones. This process helps the speaker diaphragms to loosen up and perform at their best. Follow these steps:
- Play high-quality music at 30% of normal volume for 12 hours.
- Continue playing at 60% of normal volume for another 12 hours.
- Use the earphones at normal volume for 72 hours.
- Finally, use at 80% of normal volume for 24 hours.
After these steps, the earphones should achieve approximately 90% of their potential performance.
8.2 General Usage Advice
- Always select the most comfortable and noise-isolating ear tips for your listening environment.
- Avoid pulling the cable forcefully when disconnecting from your device.
9. Important Safety Information
Responsible for Your Hearing:
- Hearing Protection: Prolonged continuous use at high volumes can cause hearing damage. It is recommended to use the earphones for no more than 1 hour at a time, with breaks in between.
- Driving/Riding Safety: Do not use earphones while driving or riding a bicycle, as this can impair your awareness of surroundings and lead to accidents.
- Environmental Hazards: Avoid using earphones in situations where you need to be aware of your surroundings, such as near traffic or heavy machinery.
Recommended Sound Exposure Levels:
| Sound Source | Noise Level (dB) | Effect |
|---|---|---|
| Whisper | 30 | Very quiet |
| Quiet Office / Normal Conversation | 50-60 | Comfortable listening range |
| Vacuum Cleaner / Hair Dryer | 70 | Intrusive, but generally safe |
| Food Blender / Garbage Truck / Cement Mixer | 85-90 | 85dB is the level at which hearing damage begins with prolonged exposure (e.g., 8 hours). |
| Power Saw / Jackhammer | 100 | Risk of hearing damage after 15 minutes. |
| Rock Concerts (varies) | 110-140 | Exposure over 1 minute may cause permanent damage. Threshold of pain begins around 125dB. |
10. Warranty and Support
For warranty information or technical support, please refer to the seller's policy or contact the point of purchase. Keep your proof of purchase for any warranty claims.
A comprehensive user manual in PDF format may be available for download. You can access it via this link: KHwatch RM670 User Manual (PDF).