1. Introdución
Welcome to the PTHTECHUS M91 Open-Ear Bluetooth Earbuds user manual. These earbuds are designed to provide a comfortable and secure listening experience, especially for sports and active lifestyles, while allowing you to stay aware of your surroundings. Featuring advanced Bluetooth 5.4 technology, directional sound transmission, and long battery life, the M91 earbuds offer clear audio and reliable performance.
Please read this manual carefully to ensure proper use, optimal performance, and longevity of your device.
2. Produto rematadoview
The PTHTECHUS M91 earbuds feature an innovative open-ear design that clips securely to your ear, avoiding insertion into the ear canal for enhanced comfort and awareness. The package includes the earbuds and a charging case.

Image: PTHTECHUS M91 Open-Ear Bluetooth Earbuds (Purple) in their charging case, showcasino deseño elegante e o factor de forma compacto.
Compoñentes:
- PTHTECHUS M91 Open-Ear Bluetooth Earbuds (Left and Right)
- Estuche de carga portátil
- Cable de carga USB
- Manual de usuario (este documento)
3. Configuración
3.1 Carga dos auriculares e da funda
Before first use, fully charge the earbuds and the charging case. The earbuds charge automatically when placed inside the case. The case itself is charged via a USB cable.
- Conecta a caixa de carga a unha fonte de alimentación mediante un cable USB compatible.
- O indicador luminoso de carga da caixa mostrará o estado de carga.
- A full charge for the earbuds takes approximately 1.5 hours.
- The earbuds offer up to 30 hours of playback time with the charging case.
- The standby time for the earbuds is up to 90 days.

Image: The PTHTECHUS M91 charging case connected to a laptop, illustrating smart connection and compatibility with various devices like mobile phones, tablets, and laptops.
3.2 Emparejamento Bluetooth
The earbuds utilize Bluetooth 5.4 for stable and interference-free transmission.
- Abre a caixa de carga. Os auriculares entrarán automaticamente no modo de emparellamento.
- No teu dispositivo (teléfono intelixente, tableta, etc.), activa o Bluetooth.
- Busca "PTHTECHUS M91" or a similar name in the list of available Bluetooth devices.
- Select the earbuds to connect. Once connected, a voice prompt will confirm the pairing.
- Os auriculares volverán conectarse automaticamente ao último dispositivo emparellado ao sacalos da funda.

Image: Diagram illustrating the advanced Bluetooth 5.4 chip inside the earbud, highlighting stable and fast wireless transmission for an enhanced user experience.
3.3 Uso dos auriculares
The open-ear design ensures comfort and stability without entering the ear canal.
- Gently clip the earbuds onto your outer ear, ensuring the speaker part is positioned towards your ear canal.
- Adjust for a secure and comfortable fit. The design is intended to prevent ear pain even during prolonged use.

Image: Illustration demonstrating the lightweight and secure fit of the open-ear earbuds on the ear, emphasizing comfort and stability compared to traditional in-ear designs.
4. Instrucións de funcionamento
Controis táctiles intelixentes 4.1
The earbuds feature intuitive touch controls for easy management of music and calls.

Image: Visual guide to the smart touch controls on the earbuds, detailing gestures for previous/next track, play/pause, volume adjustment, answering/hanging up calls, and activating voice assistant.
| Acción | Función |
|---|---|
| Press and hold Left earbud | Canción anterior |
| Press and hold Right earbud | Próxima canción |
| Double click (either earbud) | Reproducir/Pausar música, Responder/Colgar chamada |
| Presión longa (en calquera dos auriculares) | Volume +/- (cycle through volume levels) |
| Triple click (either earbud) | Activa o asistente de voz |
4.2 Directional Sound and Call Clarity
The M91 earbuds employ directional sound transmission technology, focusing sound waves towards your ear to reduce sound leakage by up to 89%, ensuring privacy during calls and an immersive listening experience.

Image: Diagram illustrating the directional sound transmission technology, showing how sound waves are focused into the ear canal to enhance privacy and reduce sound leakage.
Each earbud is equipped with a built-in microphone and ENC (Environmental Noise Cancellation) technology, ensuring your voice is transmitted clearly during phone calls, even in noisy environments.

Imaxe: Explosión view diagram of the earbud's internal components, highlighting the 12mm diaphragms and technologies that contribute to enhanced sound quality, including bass reinforcement and overall audio improvement.
5. Mantemento
5.1 Limpeza
- Limpa regularmente os auriculares e a funda de carga cun pano suave, seco e sen fiapos.
- Non empregue produtos de limpeza abrasivos, alcol nin disolventes químicos.
- Asegúrate de que os contactos de carga dos auriculares e da funda estean limpos e libres de residuos para unha carga correcta.
5.2 Almacenamento
- Cando non estean en uso, garde os auriculares no seu estoxo de carga para protexelos e mantelos cargados.
- Gardar nun lugar fresco e seco, lonxe de temperaturas extremas e da luz solar directa.
5.3 Resistencia á auga
The earbuds are rated IPX5 water-resistant, meaning they can withstand splashes of water from any direction. They are suitable for workouts and light rain, but should not be submerged in water.
- Do not expose the charging case to water, as it is not water-resistant.
- Seca completamente os auriculares antes de volvelo colocar na caixa de carga para evitar danalos.
6 Solución de problemas
| Problema | Posible Solución |
|---|---|
| Os auriculares non se emparellan co dispositivo. |
|
| Non se escoita son dun ou dos dous auriculares. |
|
| Os auriculares non cargan. |
|
| Mala calidade da chamada. |
|
7. Especificacións
| Característica | Detalle |
|---|---|
| Nome do modelo | Audífonos Inalámbricos Bluetooth M91 (M91) |
| Tecnoloxía de conectividade | Sen fíos (Bluetooth) |
| Versión Bluetooth | 5.4 |
| Colocación do oído | Open-Ear (Clip-on) |
| Nivel de resistencia á auga | IPX5 (resistente á auga) |
| Average Battery Life (Playback) | 30 horas (con caixa de carga) |
| Tempo de carga | Aprox. 1.5 horas |
| Composición da batería | Ion de litio |
| Dispositivos compatibles | Cell Phones, Bluetooth Devices |
| Dimensións do paquete | 11.6 x 9.2 x 3.7 cm |
| Peso do elemento | 90 g |
| Fabricante | BEGHELLI DE MEXICO |
8. Garantía e soporte
Your PTHTECHUS M91 Open-Ear Bluetooth Earbuds are manufactured by BEGHELLI DE MEXICO. For warranty information and customer support, please refer to the documentation included with your purchase or contact the seller directly.
For common issues, please refer to the Troubleshooting section of this manual. If you require further assistance, please reach out to the authorized seller or manufacturer's support channels.
Note: Warranty terms and support procedures may vary based on your region and point of purchase.