Introdução
Welcome to the user manual for your Koss BT221i Wireless Bluetooth Ear Clip Headphones. These headphones are designed for comfort and convenience, featuring a secure ear-clip design, in-line microphone, and remote controls. This manual will guide you through the setup, operation, and maintenance of your new headphones.
O que está na caixa
- Koss BT221i Wireless Bluetooth Ear Clip Headphones
- Manual do usuário
- Cabo de carregamento (Micro USB)
- Clipe de gerenciamento de cabos
Produto acimaview

Figure 1: Koss BT221i Wireless Bluetooth Ear Clip Headphones. This image shows the overall design of the headphones, highlighting the ear clips and the connecting cable.

Figure 2: In-Line Microphone and Remote Control. This close-up shows the control unit on the headphone cable, featuring buttons for volume, play/pause, and call management.
The Koss BT221i headphones feature a lightweight, sweat-resistant design with pivoting ear clips for a secure and comfortable fit. The in-line remote provides easy access to music playback controls, volume adjustments, and call management functions, including a built-in microphone for hands-free communication.
Configurar
Carregando os fones de ouvido
Before first use, fully charge your headphones. Connect the supplied Micro USB charging cable to the charging port on the in-line remote and plug the other end into a USB power source. A full charge typically takes approximately 1.5 hours. The LED indicator will change to show charging status (e.g., red for charging, blue for fully charged).

Figure 3: Headphones connected to a charging cable, illustrating the charging process.
Emparelhamento Bluetooth
- Certifique-se de que os fones de ouvido estejam desligados.
- Press and hold the multi-function button (usually the center button on the remote) for approximately 5-7 seconds until the LED indicator flashes red and blue alternately, indicating pairing mode.
- On your Bluetooth-enabled device (smartphone, tablet, etc.), go to the Bluetooth settings and turn Bluetooth on.
- Procurar available devices and select "Koss BT221i" from the list.
- Once paired, the LED indicator on the headphones will flash blue periodically, and you will hear an audible confirmation.
The headphones will automatically attempt to reconnect to the last paired device when turned on.
Instruções de operação
Usando os fones de ouvido
The BT221i features pivoting ear clips for a secure and comfortable fit. Gently place the ear clips over your ears, ensuring the ear pads rest comfortably on your outer ear. Adjust the pivoting mechanism to achieve the best fit and sound experience. The lightweight design ensures comfort during extended use and physical activity.

Figure 4: A woman wearing the Koss BT221i headphones, demonstrating the on-ear fit with ear clips.

Figura 5: Uma análise detalhada view of the pivoting ear clip, designed for a secure and adjustable fit.
Basic Controls (In-Line Remote)
| Botão/Ação | Função |
|---|---|
| Botão multifuncional (Centro) |
|
| Aumentar volume (+) |
|
| Volume baixo (-) |
|
Fazendo e recebendo chamadas
When connected to your smartphone, you can use the in-line remote to manage calls:
- Para atender uma chamada recebida, short press the multi-function button.
- Para end an active call, short press the multi-function button.
- Para rejeitar uma chamada recebida, press and hold the multi-function button for 2 seconds.
- The built-in microphone ensures clear voice transmission during calls.
Manutenção
- Limpeza: Limpe os fones de ouvido com um pano macio e seco. Não utilize produtos químicos agressivos ou materiais abrasivos.
- Resistência ao suor: The headphones are sweat-resistant, making them suitable for workouts. However, avoid submerging them in water.
- Armazenar: Store the headphones in a cool, dry place away from direct sunlight and extreme temperatures. Use the included cable management clip to prevent tangling.

Figure 6: The cable management clip helps keep the headphone cable tidy and prevents tangling during storage or use.
Solução de problemas
| Problema | Solução |
|---|---|
| Os fones de ouvido não ligam. | Certifique-se de que os fones de ouvido estejam totalmente carregados. Conecte-os a uma fonte de energia e verifique o indicador de carregamento. |
| Não foi possível emparelhar com o dispositivo. |
|
| Sem som ou volume muito baixo. |
|
| Uncomfortable fit or ear pads falling off. |
|
Especificações
| Recurso | Detalhe |
|---|---|
| Nome do modelo | BT221i Bluetooth Wireless Headphones |
| Versão Bluetooth | 4.2 |
| Duração da bateria | Mais de 6 horas |
| Tempo de carregamento | Approx. 1.5 hours (from customer review) |
| Tipo de controle | Controle de volume, controle remoto |
| Microfone | Microfone em linha |
| Resistência à água | Resistente ao suor |
| Colocação da orelha | On Ear (Ear Clip) |
| Peso do item | 1.95 onças (0.06 quilogramas) |
| Dimensões do produto | 0.98 x 0.98 x 0.98 polegadas |
Garantia e Suporte
Your Koss BT221i Wireless Bluetooth Ear Clip Headphones come with a Garantia limitada de um ano. For warranty claims or technical support, please visit the official Koss webVisite o site ou entre em contato com o departamento de atendimento ao cliente. Guarde o comprovante de compra para validação da garantia.
Vídeo oficial do produto
Video 1: An official product video from Koss Stereophones showcasing the BT221i Wireless Bluetooth Ear Clips, highlighting features like the in-line mic, remote, and 6+ hour battery life.





