Bluetooth 5.1
Ergonomic Design
Stable For Any Workout
Auto Pairing
Large Capacity Battery
Good Compatibility
Comfort Fit
IPX7 Waterproof

Super Stable Bluetooth 5.0  Technology

These true wireless earbuds employ the most advanced Bluetooth 5.0 technology to give you the best listening experience. Features included are simple and instant pairing, auto reconnection, improved connection stability and improved battery performance.

One-Step Automatic Paring

Pick up the sports earphones from charging case, they will power on and pair with each other automatically. Then active your phone's bluetooth to search “NT25B” to connect. After the first successful connection, the sports earbuds will automatically connect to the last paired device when reboot. Widely compatible with your iPhone Tablet and any Android portable devices with Bluetooth system. Wireless earphones for work, home and office

Perfect for Sports Secure-fit Earhooks

upgrade sport wireless earbuds are designed with soft, flexible and secure fit earhooks aimed at fully fitting your ears without falling out even for intense workouts. They will always stay to ensure unmatched comfort and stability when you move. Comeing with 3 different sizes earplug for a comfortable and secure fit, better seal, better sound.Whether you’re headed to the gym or for a night on the town, you’ll now have the perfect “Matched Set.” Our NT25B buds offer superior sound, fit and looks. So, go ahead - treat yourself (or yourself and someone else).

Ultra-long Working Time And IPX7 Waterproof

Premium quality lithium accumulator, portable charging case, both of them allow you enjoy the music on-the-go for 20hours. This IPX7 waterproof sport earbuds are made of high quality waterproof materials, multi process design headphone body, high specification waterproof test, bluetooth headset can effectively protect the internal components from water, rain and sweat. It is the superb choice for indoor and outdoor sports including running, jogging, mountain biking and more.


Model: NT25B
earphone weight (single): 9.1 g
charging box weight: 76.5 g
machine weight: 95 g
earphone size: 47.5*39.5*31.5 mm
charging box size: 76*68.8*42 mm
earphone battery capacity (single): 55 mAh
charging box battery capacity: 500 mAh
earphone charging time: 60 minutes
charging box charging time: 120 minutes
speaker impedance: 32 Ω
communication distance: 15 meters
Support audio format: AAC/SBC

Use time
* Headphone fully charged state
Talk time: 4-5 hours
Music playback: 5 hours
* Headphone fully charged + charging box fully charged state
Talk time: 16 hours
Music playback: 20 hours 
Bluetooth specification: Bluetooth® 5.0
Bluetooth protocol: HFP / A2DP / AVRCP
input: 5V 1A
Operating temperature: 0 ℃ ~ 45 ℃
Frequency band: 2.400 GHz ~ 2.4835 GHz
The specification parameters are laboratory test data.
* The playback time is the laboratory measurement data under the condition of AAC format and 50% volume, which may vary depending on the device settings, environment, usage, and many other factors.