K31 Neckband Bluetooth 5.0 Sports Earphones | 40-Hour Playtime | CVC Noise Cancellation | 4 Colours
The K31 Neckband Bluetooth 5.0 Sports Earphones deliver up to 40 hours of continuous music playback from a 500 mAh battery — making them one of the longest-lasting wireless earphones in their class. A 10 mm large-magnet speaker delivers clear, bass-rich HIFI sound, while CVC audio technology cancels background noise during calls for crystal-clear voice quality. The lightweight neckband design with soft, ergonomic ear hooks keeps them secure and comfortable through even the most intense workouts. Available in Black/Silver, Obsidian, Black/Red, and Black/Green.
Why You'll Love It
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40-Hour Playtime: 500 mAh high-capacity battery delivers approximately 40 hours of music and up to 300 hours standby — charge once, listen all week.
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Bluetooth 5.0: Stable, low-latency connection up to 10 metres with fast pairing and multi-point connection support.
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CVC Noise Cancellation: Background noise suppression during calls for clear, hands-free voice quality in any environment.
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10 mm Large-Magnet Driver: Powerful speaker delivers rich bass and detailed HIFI sound across the full audio range.
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TF Card MP3 Mode: Insert a TF (microSD) card to play music directly without a phone connection.
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Neckband Design: Lightweight, flexible neckband with ergonomic ear hooks for a secure, never-fall-out fit during sport and exercise.
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Simple Button Control: Volume, track change, play/pause, and call answer/reject — all from the inline controls, no phone needed.
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Battery Display: Real-time battery level indicator so you always know your remaining charge.
Perfect For
Runners, gym-goers, commuters, and active users who want long-lasting wireless audio with a secure neckband fit, hands-free calling, and the option to play music directly from a TF card.
Specifications
| Spec |
Detail |
| Model |
K31 |
| Bluetooth Version |
5.0 |
| Transmission Range |
Up to 10 metres |
| Driver |
10 mm large magnet speaker |
| Channel |
Bilateral Stereo |
| Battery |
500 mAh |
| Playtime |
Up to 40 hours |
| Standby Time |
Up to 300 hours |
| Noise Cancellation |
CVC |
| TF Card Support |
Yes (MP3 mode) |
| Wear Type |
Neckband (hanging ear) |
| Functions |
Music, calls, battery display, multi-point connection |
| Colours |
Black/Silver, Obsidian, Black/Red, Black/Green |
| Weight |
122 g |
What's in the Box
1 × K31 Neckband Bluetooth Earphones | 1 × Charging Cable | 2 × Spare Ear Tips | 1 × User Manual
Compatibility and selection
Confirm the connection method, device compatibility, dimensions, power requirements and selected variant before ordering. Supplier-listed specifications should be checked against the final product documentation.
Frequently asked questions
How do I choose the correct option?
No. Compare the variant name, connector, colour, size and device requirements shown on the listing before purchase.
Are supplier-listed performance, safety or wellness features independently verified?
No. These details are provided for product identification and general reference. Wellness functions are not medical devices and must not be used for diagnosis or treatment.
Evidence note: GTIN or manufacturer identifier evidence remains under review.
