1. Introducció
Welcome to the Boytond S19 UltraFit Series Ultra Open Ear Earbuds. These innovative earbuds are designed to provide a comfortable and immersive audio experience while keeping you aware of your surroundings. Featuring an ergonomic clip-on design, advanced Bluetooth 5.3 connectivity, and long-lasting battery life, they are ideal for various activities including sports, fitness, and daily use.

Figure 1: Boytond S19 UltraFit Series Ultra Open Ear Earbuds and Charging Case.
2. Producte acabatview
The Boytond S19 UltraFit Series earbuds offer a unique open-ear design that prioritizes comfort and situational awareness. Key features include:
- Immersive Open-Ear Design: Enjoy rich sound while remaining connected to your environment. The design promotes ventilation and reduces sweat buildup, ensuring comfort during extended use.
- Ajust ergonòmic i còmode: Designed with flexible joints and lightweight, breathable grips, these clip-on earbuds sit securely over your ears without causing pressure. This allows for natural conversation without removal, enhancing safety and spatial awareness.
- Realistic Stereo Experience & Clear Calls: Equipped with 16.3mm dynamic drivers, the earbuds deliver immersive stereo sound with clear instrument and vocal reproduction. Advanced drivers ensure crystal-clear communication for seamless conversations.
- Temps de reproducció ampliat: Powered by high-density lithium batteries and energy-locking technology, the earbuds offer up to 10 hours of continuous playback on a single charge. The charging case provides an additional 40 hours, totaling up to 50 hours. Fast-charging technology allows for 1 hour of playback with just 5 minutes of charging.
- Connectivitat Bluetooth 5.3 avançada: Experience fast data transmission and stable connections within a 33-foot range. Intelligent auto-on and connect features provide uninterrupted, low-latency audio.

Figure 2: Ergonomic clip-on design for secure fit.

Figure 3: Lightweight design ensures comfort.
Video 1: Explanation of bone conduction technology in earphones.
Video 2: Comparison of various bone conduction earbuds.
3. Què hi ha a la caixa
Upon unboxing your Boytond S19 UltraFit Series Earbuds, you will find the following components:
- Boytond True Wireless Earbuds (x2)
- Boytond Charging Case (x1)
- Fast Charging USB-C Cable (x1)
- Quick Start User Guide (x1)

Figure 4: Included components in the product packaging.
4. Configuració
4.1 Càrrega de la funda i els auriculars
- Col·loca els auriculars a l'estoig de càrrega. Assegura't que estiguin correctament col·locats per iniciar la càrrega.
- Connecteu el cable de càrrega USB-C al port de càrrega de la funda i a una font d'alimentació.
- The digital display on the charging case will show the battery level of the case and individual earbuds. A full charge is indicated by '100' on the display.

Figure 5: Earbuds in charging case with digital battery display.
4.2 Vinculació amb un dispositiu
- Open the charging case. The earbuds will automatically power on and enter pairing mode, indicated by a flashing red and blue light on the earbuds.
- Al dispositiu (telèfon intel·ligent, tauleta, ordinador portàtil), activeu el Bluetooth i cerqueu els dispositius disponibles.
- Select 'YYK-S19' from the list of available devices to connect. Once connected, the indicator light on the earbuds will stop flashing.

Figure 6: Earbuds connected to multiple devices via Bluetooth 5.3.
5. Instruccions de funcionament
5.1 Com posar-se els auriculars
The S19 UltraFit Series earbuds feature a clip-on design. Gently place the earbud over your ear, ensuring the speaker rests comfortably near your ear canal without entering it. The flexible design adapts to various ear shapes for a secure and comfortable fit.
Video 3: Demonstration of wearing the ergonomic clip-on earbuds.
5.2 Controls tàctils
The earbuds are equipped with intuitive touch controls for easy management of music and calls:
- Reproduir/pausa: Un sol toc a qualsevol dels auriculars.
- Següent cançó: Toqueu dues vegades l'auricular dret.
- Cançó anterior: Toqueu tres vegades l'auricular esquerre.
- Pujar el volum: Toqueu dues vegades l'auricular esquerre.
- Baixar el volum: Toqueu dues vegades l'auricular dret.
- Respondre/Finalitzar la trucada: Un sol toc a qualsevol dels auriculars.
- Rebutja la trucada: Press and hold either earbud for 1 second.
- Activa l'assistent de veu (Siri/Assistent de Google): Toqueu tres vegades qualsevol dels auriculars.

Figura 7: Mésview dels controls tàctils dels auriculars.
6. Manteniment
- Neteja: Netegeu regularment els auriculars i l'estoig de càrrega amb un drap suau, sec i sense borrissol. Eviteu utilitzar productes químics agressius o materials abrasius.
- Emmagatzematge: Guarda els auriculars a la seva funda de càrrega quan no els facis servir per protegir-los i assegurar-te que es mantinguin carregats.
- Resistència a l'aigua: The earbuds are waterproof, making them suitable for exercise and light rain. However, avoid prolonged submersion in water.
7. Solució De Problemes
- Auriculars que no s'emparellan: Ensure both earbuds are in the charging case, then open the lid to activate pairing mode. Check your device's Bluetooth settings to ensure 'YYK-S19' is selected.
- Sense so: Verify that the earbuds are connected to your device and the volume is turned up on both the earbuds and your device.
- Problemes de càrrega: Assegura't que el cable de càrrega estigui connectat correctament tant a la funda com a la font d'alimentació. Comprova si hi ha residus als contactes de càrrega dels auriculars i a l'interior de la funda.
- Restabliment dels auriculars: If you experience persistent issues, refer to the quick start guide for specific reset instructions.
8. Especificacions
| Característica | Detall |
|---|---|
| Marca | Boytond |
| Nom del model | S30i (S19 UltraFit Series) |
| Tecnologia de connectivitat | Sense fil (Bluetooth 5.3) |
| Tecnologia de comunicació sense fils | Bluetooth |
| Interval Bluetooth | 10.06 metres (aprox. 33 peus) |
| Col·locació de l'orella | Orella oberta |
| Factor de forma | A l'orella |
| Nivell de resistència a l'aigua | Impermeable |
| Tipus de controlador d'àudio | Conductor dinàmic |
| Dispositius compatibles | Telèfons mòbils, tauletes, ordinadors portàtils, altaveus intel·ligents |
| Pes de l'article | 4.2 unces |
| Dimensions del paquet | 4.96 x 3.78 x 1.61 polzades |
9. Garantia i Suport
The Boytond S19 UltraFit Series Earbuds come with a standard warranty. For extended warranty information or to register your product, please refer to the QR codes provided in your Quick Start User Guide or visit the official Boytond support weblloc.
For any technical assistance or customer service inquiries, please contact Boytond customer support through the channels listed in your product documentation.





