1. Introduction
Thank you for choosing the MSHUKCOE SK18 Ultra Small Wireless Earbuds. This manual provides essential information for the safe and effective use of your new earbuds. Please read it thoroughly before use and retain it for future reference.
2. Safety Information
- Do not disassemble or modify the earbuds or charging case.
- Keep the device away from extreme temperatures, humidity, and corrosive substances.
- Avoid prolonged exposure to high volume levels to prevent hearing damage.
- Keep out of reach of children and pets to prevent accidental ingestion of small parts.
- Dispose of the device and batteries according to local regulations.
3. Package Contents
Please check that all items are present in your package:
- MSHUKCOE SK18 Wireless Earbuds (Left and Right)
- Portable Charging Case
- USB Type-C Charging Cable
- Multiple Sizes of Ear Tips (S/M/L)
- User Manual
4. Product Overview
The MSHUKCOE SK18 earbuds are designed for comfort and portability, featuring a compact size and a charging case with a digital display.

Figure 4.1: MSHUKCOE SK18 Wireless Earbuds in their charging case.
4.1 Key Features
- Ultra-Small Design: Lightweight and comfortable for extended wear, including during sleep.
- Bluetooth 5.3: Ensures stable and efficient wireless connectivity.
- Digital Power Display: Charging case shows remaining battery percentage.
- Touch Controls: Manage music, calls, and voice assistant with simple taps.
- IPX5 Waterproof: Resistant to sweat and light splashes.

Figure 4.2: The compact size of the SK18 earbuds.

Figure 4.3: Detailed dimensions of the earbuds and charging case.
4.2 Components
- Earbud (Left/Right)
- Charging Case with Digital Display
- USB Type-C Charging Port (on case)
- Touch Control Area (on each earbud)
- Microphone (on each earbud)
5. Setup Guide
5.1 Initial Charging
Before first use, fully charge the earbuds and the charging case.
- Place both earbuds into the charging case.
- Connect the USB Type-C cable to the charging port on the case and to a power source (e.g., USB wall adapter, computer USB port).
- The digital display on the case will show the battery percentage, indicating charging status. The earbuds will also show a charging indicator.
- Once fully charged, the display will show 100%. Disconnect the charging cable.

Figure 5.1: Charging the earbuds and case via Type-C port.
5.2 Bluetooth Pairing
To connect your earbuds to a device:
- Ensure both earbuds are charged and inside the charging case.
- Open the charging case. The earbuds will automatically enter pairing mode, indicated by flashing lights (if applicable, or a voice prompt).
- On your device (smartphone, tablet, etc.), go to Bluetooth settings and turn Bluetooth on.
- Search for available devices and select "SK18" from the list.
- Once connected, a voice prompt will confirm successful pairing, and the earbud indicator lights will turn off or flash slowly.
- For subsequent use, the earbuds will automatically connect to the last paired device when removed from the case.

Figure 5.2: The SK18 earbuds are compatible with various Bluetooth-enabled devices.
5.3 Wearing the Earbuds
The SK18 earbuds are designed for a secure and comfortable fit, even for small ears or during sleep.
- Choose the ear tips that provide the best seal and comfort for your ears.
- Gently insert each earbud into your ear canal.
- Rotate the earbud slightly until it feels snug and secure. The design allows for comfortable wear without pressing against the ear, even when lying on your side.

Figure 5.3: The SK18 earbuds are designed for comfortable wear, including during sleep.
6. Operating Instructions
The SK18 earbuds feature intuitive touch controls on each earbud.

Figure 6.1: Touch control functions.
6.1 Basic Functions
- Power On: Open the charging case, or press and hold the touch area on both earbuds for 3 seconds.
- Power Off: Place earbuds back into the charging case and close the lid, or press and hold the touch area on both earbuds for 5 seconds.
- Play/Pause: Double-tap the touch area on either earbud.
- Next Track: Triple-tap the touch area on the right earbud.
- Previous Track: Triple-tap the touch area on the left earbud.
- Volume Up: Press and hold the touch area on the right earbud for 1.5 seconds.
- Volume Down: Press and hold the touch area on the left earbud for 1.5 seconds.
6.2 Call Management
- Answer/End Call: Double-tap the touch area on either earbud.
- Reject Call: Press and hold the touch area on either earbud for 1.5 seconds.
6.3 Voice Assistant
- Activate Voice Assistant (Siri, Google Assistant, etc.): Quadruple-tap the touch area on either earbud.
7. Maintenance and Care
- Cleaning: Use a soft, dry, lint-free cloth to clean the earbuds and charging case. Do not use harsh chemicals or abrasive materials.
- Ear Tips: Regularly remove and clean the ear tips with water and mild soap. Ensure they are completely dry before reattaching.
- Storage: When not in use, store the earbuds in their charging case to protect them and keep them charged. Store in a cool, dry place.
- Water Exposure: While IPX5 rated, avoid submerging the earbuds in water. Dry them thoroughly if they get wet.
8. Troubleshooting
If you encounter issues with your SK18 earbuds, please refer to the following common solutions:
8.1 Earbuds Not Pairing/Connecting
- Ensure both earbuds are charged.
- Make sure Bluetooth is enabled on your device.
- Place the earbuds back in the charging case, close the lid, wait a few seconds, then open it again to re-enter pairing mode.
- Forget "SK18" from your device's Bluetooth list and attempt to pair again.
- Try pairing with a different device to rule out device-specific issues.
8.2 Only One Earbud Working
- Ensure both earbuds are charged.
- Place both earbuds back in the charging case, close the lid, and then open it again. This often resets the connection between them.
- Perform a factory reset (refer to the manufacturer's website or contact support if not detailed here).
8.3 Charging Issues
- Verify the USB Type-C cable is securely connected to both the charging case and the power source.
- Try a different USB Type-C cable and power adapter.
- Ensure the charging contacts on the earbuds and inside the case are clean and free of debris.
- If the battery life is significantly shorter than expected (e.g., 2 hours instead of 4-6 hours), ensure the earbuds are fully charged before use. Note that battery performance can degrade over time.
8.4 Touch Controls Unresponsive
- Ensure your fingers are clean and dry when using touch controls.
- Confirm you are tapping the correct area on the earbud.
- Restart the earbuds by placing them in the case and taking them out again.
8.5 Low Battery Alarm
- The earbuds will provide a "LOW BATTERY" voice prompt when the battery is critically low. This is a normal function to alert you to recharge.
- To avoid interruption, monitor the battery level via the charging case display or your connected device's Bluetooth battery indicator.
9. Specifications
| Feature | Detail |
|---|---|
| Model Name | MSHUKCOE-SK18 |
| Connectivity Technology | Wireless (Bluetooth 5.3) |
| Bluetooth Range | 10 Meters |
| Ear Placement | In Ear |
| Noise Control | Sound Isolation (Passive Noise Isolation) |
| Frequency Response | 20000 Hz |
| Sensitivity | 90 dB |
| Impedance | 32 Ohm |
| Control Method | Touch |
| Water Resistance Level | IPX5 (Waterproof) |
| Battery Life (Earbuds) | Up to 4-6 Hours (Continuous Play) |
| Total Playtime (with Case) | Up to 24 Hours |
| Charging Port | USB Type-C |
| Earbud Weight | 2g (each) |
| Charging Case Weight | 42 Grams |
| Product Dimensions | 0.69 x 0.57 x 0.73 inches (earbud) |
| Carrying Case Dimensions | 4 x 4 x 4.7 Centimeters |
| Material | Plastic |
| Included Components | Earbuds, Charging Case, USB Type-C Cable, Ear Tips |
10. Warranty and Support
MSHUKCOE products come with a standard manufacturer's warranty. For detailed warranty information, product support, or to report any issues, please contact our customer service team.
You can typically find contact information on the product packaging or the official MSHUKCOE website. Please have your model number (SK18) and purchase date ready when contacting support.
11. Product Video Guide
Watch this official video for a visual guide on the MSHUKCOE SK18 earbuds' features and usage.
Video 11.1: An overview of the SK18 In-Ear Mini Headset, demonstrating its design and key functionalities.