CoolJumper Q28-B
CoolJumper Open Ear Bluetooth 5.4 Earbuds User Manual
Model: Q28-B
Introduction
Thank you for choosing the CoolJumper Open Ear Bluetooth 5.4 Earbuds. These wireless headphones are designed for comfort and awareness, allowing you to enjoy audio while remaining connected to your surroundings. Featuring advanced Bluetooth 5.4 technology, a long-lasting battery, and a waterproof design, they are ideal for various activities including running, workouts, and daily use.
Image: A pair of CoolJumper Open Ear Bluetooth Earbuds, one showing the outer design and the other showing the inner ear hook and speaker area.
What's in the Box
Your CoolJumper Open Ear Bluetooth Earbuds package includes the following items:
- 2 x Open-ear Headphones (Left and Right)
- 1 x Charging Case
- 1 x USB-C Charging Cable
- 1 x User Manual
Image: An exploded view showing the contents of the product package: two open-ear headphones, a charging case, a USB-C cable, and the user manual.
Product Overview
Design and Comfort
The YYK-Q28 Open Ear Bluetooth Headphones feature an ergonomic design that rests comfortably over your ear without entering the ear canal. This allows for situational awareness while listening to audio. The lightweight design (0.26oz per earbud) and skin-friendly silicone ensure comfortable, all-day wear.
Image: A visual representation of the ergonomic open-ear design, emphasizing its flexible, comfortable, and lightweight attributes.
Charging Case with LED Display
The compact charging case provides additional playtime and features an LED digital display to show the battery percentage of the case and individual earbuds. This allows you to easily monitor battery levels.
Image: The earbuds resting in their charging case, with an LED display showing battery percentages for both the case and individual earbuds. Text indicates 8 hours of playtime, 32 hours of additional battery life from the case, and 1.5 hours for Type-C charging.
Bluetooth 5.4 Technology
Equipped with Bluetooth 5.4, these earbuds offer faster and more stable transmission speeds, ensuring high-quality sound with ultra-low latency and perfect synchronization. They are compatible with a wide range of Bluetooth-enabled devices.
Image: A detailed view of the Bluetooth 5.4 chip, illustrating its benefits in terms of transmission speed, connection stability, and extended range.
Audio Quality
The earbuds feature a 14.2 mm dynamic speaker and bone conduction technology, optimizing audio performance for clear, distinct HI-FI sound with enhanced bass.
Image: An exploded diagram of the earbud's internal speaker components, emphasizing the 14.2mm dynamic speaker and its contribution to enhanced highs, mids, and bass frequencies.
Setup and First Use
Initial Charging
Before first use, it is recommended to fully charge the charging case and earbuds. Connect the provided USB-C cable to the charging port on the case and a compatible USB power source. The LED display will indicate the charging status. A full charge for the case takes approximately 1.5 hours.
Image: The earbuds resting in their charging case, with an LED display showing battery percentages for both the case and individual earbuds. Text indicates 8 hours of playtime, 32 hours of additional battery life from the case, and 1.5 hours for Type-C charging.
Wearing the Earbuds
To wear the earbuds, gently hang the end of the earbud on your earbone, then rotate and slide it behind your ear. Adjust for a comfortable and secure fit.
Image: A step-by-step guide demonstrating the correct way to wear the open-ear earbuds for optimal fit and comfort.
Pairing with Your Device
The earbuds support automatic one-step pairing. Simply take them out of the charging case, and they will automatically enter pairing mode. Then, open the Bluetooth settings on your smartphone, tablet, or other compatible device and select "YYK-Q28" from the list of available devices to connect.
Image: A smartphone displaying its Bluetooth settings, showing the "YYK-Q28" earbuds successfully connected, with the earbuds and their charging case in the foreground.
For a visual guide on pairing and features, please watch the official product video below:
Video: An official product video demonstrating the features and setup of the CoolJumper Open Ear Bluetooth 5.4 Earbuds.
Operating Instructions
Touch Controls
The earbuds are equipped with flexible touch controls for easy management of your audio and calls. Refer to the diagram below for specific functions:
Image: A visual guide detailing the various touch control gestures on the earbuds for functions such as play/pause, track skipping, volume adjustment, call management, and voice assistant activation.
| Action | Function |
|---|---|
| Double Tap (L/R) | Play/Pause Music, Answer/Hang Up Call |
| Long Press 1s (L) | Previous Song |
| Long Press 1s (R) | Next Song |
| Triple Tap (L/R) | Adjust Volume, Activate Voice Assistant (Siri) |
| Long Press 1s (during incoming call) | Reject Call |
Care and Maintenance
Water Resistance
The earbuds feature an IPX7 waterproof rating, making them resistant to rain, sweat, and splashes. This makes them suitable for workouts and outdoor activities. However, they are not designed for swimming or prolonged submersion in water.
Image: The earbuds and their charging case shown with water splashing around them, visually representing their IPX7 rainproof, sweatproof, and waterproof capabilities.
Cleaning and Storage
To maintain optimal performance and hygiene, regularly clean your earbuds with a soft, dry cloth. Avoid using abrasive materials or harsh chemicals. Store the earbuds in their charging case when not in use to protect them and ensure they are charged for your next use.
Troubleshooting
| Problem | Possible Cause / Solution |
|---|---|
| Earbuds not pairing | Ensure earbuds are out of the case and in pairing mode. Turn Bluetooth off and on again on your device. Forget "YYK-Q28" from your device's Bluetooth list and re-pair. |
| No sound or low volume | Check device volume and earbud volume. Ensure earbuds are properly connected. Recharge earbuds and case. |
| Earbuds not charging | Ensure charging cable is securely connected to both the case and power source. Check if the charging port is clean. Try a different USB-C cable or power adapter. |
| Intermittent connection | Move closer to your connected device (within 15 meters). Avoid obstacles between earbuds and device. Reduce interference from other wireless devices. |
| Earbuds uncomfortable or falling out | Adjust the ear hook position as per the wearing instructions. Ensure the earbud is properly seated on the earbone. |
Specifications
| Feature | Detail |
|---|---|
| Model Name | Q28-B |
| Connectivity Technology | Wireless (Bluetooth 5.4) |
| Bluetooth Range | 15 Meters |
| Audio Driver Type | Bone Conduction Driver |
| Frequency Range | 20 Hz - 20,000 Hz |
| Control Type | Touch Control |
| Water Resistance Level | IPX7 (Waterproof) |
| Earbud Weight | 0.26 oz (each) |
| Earbud Playtime | Up to 8 hours (single charge) |
| Total Playtime (with charging case) | Up to 40 hours |
| Charging Case Battery Capacity | 32 Milliamp Hours |
| Charging Case Charging Time | 1.5 hours (via Type-C) |
| Compatible Devices | Most Bluetooth-enabled devices (iOS, Android, Windows, etc.) |
Warranty and Support
For detailed warranty information and customer support, please refer to the official user manual included in your product package or visit the CoolJumper official website. You can also find additional support resources and FAQs there.
A digital version of the user manual is available here.
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