CoolJumper YYK-Q16S
CoolJumper Wireless Earbuds User Manual
Model: YYK-Q16S
1. Product Overview
The CoolJumper YYK-Q16S Wireless Earbuds are open-ear type earphones designed for comfort and situational awareness. Featuring Bluetooth 5.4 technology, they offer stable connectivity and low latency. The innovative 8D audio processing and directional sound transmission technology provide a rich audio experience while minimizing sound leakage. With a total playtime of up to 60 hours using the charging case, and an IPX7 waterproof rating, these earbuds are suitable for various activities including exercise, work, and daily commuting.

Image: CoolJumper YYK-Q16S Wireless Earbuds in their open charging case, showcasing the design and LED display.
2. What's in the Box
- Q16S Earphones x 1 pair
- Charging Case x 1
- USB-C Charging Cable x 1
- User Manual x 1
- Package Box x 1

Image: All components included in the CoolJumper YYK-Q16S package: earbuds, charging case, USB-C cable, and user manual.
3. Setup
3.1 Charging the Earbuds and Case
Before first use, fully charge the earbuds and the charging case. Connect the provided USB-C cable to the charging port on the case and a power source. The LED display on the case will indicate the charging status and battery level. A full charge takes approximately 1 hour for the case. The earbuds can be charged by placing them inside the case. A 10-minute charge provides approximately 1.5 hours of usage.

Image: Visual representation of the CoolJumper YYK-Q16S earbuds' 60-hour total playtime, Type-C fast charging, and LED battery display.
3.2 Pairing with Your Device
- Ensure your device's Bluetooth is turned on.
- Open the charging case. The earbuds will automatically power on and enter pairing mode.
- On your device, search for Bluetooth devices and select "YYK-Q16S" from the list.
- Once connected, the earbuds will indicate successful pairing.
After the initial pairing, the earbuds will automatically connect to the last paired device when removed from the charging case.

Image: Depiction of Bluetooth 5.4 technology and the automatic power-on/off function when earbuds are removed from or placed back into the charging case.
3.3 Wearing the Earbuds
The YYK-Q16S earbuds feature an ergonomic ear-hook design made of super soft silicone rubber for a secure and comfortable fit. Gently place the earbud over your ear, adjusting the ear hook until it sits comfortably and securely. This design ensures stability even during intense activities and prevents discomfort from prolonged wear.

Image: Illustrates the 8D audio technology and the secure, comfortable fit of the ear-hook design, showing individuals wearing the earbuds during activity.

Image: Highlights the lightweight (8g) and soft silicone material of the earbuds, emphasizing a comfortable and barely noticeable wearing experience.
4. Operating Instructions
4.1 Touch Controls
The YYK-Q16S earbuds feature sensitive touch controls for easy operation without needing to access your smartphone. The touch button is designed to prevent accidental operations.
- Play/Pause: Single tap on either earbud.
- Answer/End Call: Single tap on either earbud.
- Next Track: Double tap on the right earbud.
- Previous Track: Double tap on the left earbud.
- Volume Up: Triple tap on the right earbud.
- Volume Down: Triple tap on the left earbud.
- Activate Voice Assistant (Siri/Google Assistant): Long press (2 seconds) on either earbud.

Image: Diagram illustrating the touch control functions (play/pause, Siri/voice command, volume adjustment, track skipping) and the directional sound transmission technology.
4.2 Single and Dual Earbud Use
The earbuds can be used independently. You can use both earbuds for stereo sound or use a single earbud for calls or listening while remaining aware of your surroundings.
5. Key Features
- Bluetooth 5.4 Technology: Provides enhanced stability, lower latency, and improved communication range, even in environments with high interference like trains and buses.
- Extended Playtime: Up to 10 hours on a single charge (5 hours per earbud) and a total of 60 hours with the portable charging case.
- 8D Audio Processing & Directional Sound: Utilizes SurroundWave sound processing for a three-dimensional, realistic music effect. Directional sound transmission concentrates audio towards the ear, effectively reducing sound leakage while allowing ambient sounds to be heard for safety.
- Open Ear Design: Does not block the ear canal, ensuring comfort for long periods and maintaining awareness of your surroundings, ideal for outdoor activities. Equipped with a 14.2mm dynamic driver for balanced Hi-Fi sound quality.
- IPX7 Sweatproof and Waterproof: Designed to withstand sweat during exercise and exposure to rain, making them suitable for various weather conditions and active lifestyles.

Image: Comparison of different earbud types, highlighting the open-ear design of the YYK-Q16S and its 14.2mm dual driver for high-resolution audio.

Image: Demonstrates the benefit of the open-ear design in various scenarios (office, running, commuting), allowing users to maintain awareness of their surroundings for safety.
6. Maintenance
To ensure the longevity and optimal performance of your CoolJumper YYK-Q16S earbuds, follow these maintenance guidelines:
- Cleaning: Regularly wipe the earbuds and charging case with a soft, dry, lint-free cloth. Do not use abrasive cleaners, alcohol, or chemical solvents.
- Storage: When not in use, store the earbuds in their charging case to protect them from dust and damage. Store in a cool, dry place away from extreme temperatures.
- Charging: Avoid overcharging. Disconnect the charging cable once the case is fully charged.
- Water Exposure: While IPX7 waterproof, avoid prolonged submersion in water. Dry the earbuds completely before placing them back in the charging case to prevent damage to the charging contacts.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Earbuds do not power on. | Low battery. | Place earbuds in the charging case and ensure the case is charged. |
| Cannot pair with device. | Bluetooth is off on device; earbuds not in pairing mode; previously paired device interfering. | Ensure Bluetooth is on. Place earbuds in case, close, then open to re-enter pairing mode. Forget "YYK-Q16S" from device's Bluetooth list and try pairing again. |
| Sound is intermittent or skipping. | Too far from device; interference; low earbud battery. | Move closer to your device. Avoid strong electromagnetic interference. Charge earbuds. |
| No sound from one earbud. | Earbud not connected; low battery; earbud malfunction. | Place both earbuds back in the case, close the lid, then open again. Ensure both are charged. If issue persists, try resetting the earbuds (refer to manufacturer support if needed). |
| Charging case not charging. | Faulty cable or power adapter; dirty charging port. | Try a different USB-C cable and power adapter. Clean the charging port gently. |
8. Specifications
| Feature | Detail |
|---|---|
| Model Name | YYK-Q16S |
| Connectivity Technology | Wireless (Bluetooth) |
| Bluetooth Version | 5.4 |
| Bluetooth Range | 15 Metres |
| Ear Placement | Open Ear |
| Audio Driver Size | 14.2 Millimetres |
| Battery Life (Earbuds) | Up to 10 hours (5 hours per earbud) |
| Total Playtime with Case | Up to 60 Hours |
| Charging Time (Case) | 1 Hour |
| Water Resistance Level | IPX7 Waterproof |
| Control Type | Touch |
| Item Weight | 135 Grams (total, likely including case) |
| Material | Metal, Silicone (earbuds), Plastic (case) |
| Manufacturer | CoolJumper |
| Country of Origin | USA |
9. Warranty and Support
CoolJumper products are designed for reliability and performance. For any product inquiries, technical support, or warranty claims, please refer to the contact information provided on the product packaging or the official CoolJumper website. Keep your purchase receipt as proof of purchase for warranty purposes.
For additional resources and frequently asked questions, you may visit the manufacturer's support page or contact their customer service directly.
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