pengenalan
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.
Apa yang ada dalam Kotak
- Koss BT221i Wireless Bluetooth Ear Clip Headphones
- Manual Pengguna
- Kabel Pengecas (Mikro USB)
- Klip Pengurusan Kabel
Produk Selesaiview

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.
Persediaan
Mengecas Fon Kepala
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.
Berpasangan Bluetooth
- Pastikan fon kepala dimatikan.
- 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.
- Cari untuk 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.
Fon kepala akan cuba menyambung semula secara automatik ke peranti yang terakhir dipasangkan apabila dihidupkan.
Arahan Operasi
Memakai Fon Kepala
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.

Rajah 5: Satu terperinci view of the pivoting ear clip, designed for a secure and adjustable fit.
Basic Controls (In-Line Remote)
| Butang/Tindakan | Fungsi |
|---|---|
| Butang pelbagai fungsi (Pusat) |
|
| Kelantangan Naik (+) |
|
| Perlahankan suara (-) |
|
Membuat dan Menerima Panggilan
When connected to your smartphone, you can use the in-line remote to manage calls:
- Kepada menjawab panggilan masuk, short press the multi-function button.
- Kepada tamatkan panggilan aktif, short press the multi-function button.
- Kepada menolak panggilan masuk, press and hold the multi-function button for 2 seconds.
- The built-in microphone ensures clear voice transmission during calls.
Penyelenggaraan
- Pembersihan: Lap fon kepala dengan kain lembut dan kering. Jangan gunakan bahan kimia yang keras atau bahan yang melelas.
- Rintangan peluh: The headphones are sweat-resistant, making them suitable for workouts. However, avoid submerging them in water.
- Storan: 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.
Menyelesaikan masalah
| Masalah | Penyelesaian |
|---|---|
| Fon kepala tidak boleh dihidupkan. | Pastikan fon kepala dicas sepenuhnya. Sambungkan kepada sumber kuasa dan periksa penunjuk pengecasan. |
| Tidak boleh berpasangan dengan peranti. |
|
| Tiada bunyi atau kelantangan rendah. |
|
| Uncomfortable fit or ear pads falling off. |
|
Spesifikasi
| Ciri | Perincian |
|---|---|
| Nama Model | BT221i Bluetooth Wireless Headphones |
| Versi Bluetooth | 4.2 |
| Hayat Bateri | 6+ Jam |
| Masa Mengecas | Approx. 1.5 hours (from customer review) |
| Jenis Kawalan | Kawalan Kelantangan, Jauh |
| Mikrofon | Mikrofon Dalam Talian |
| Tahan Air | Tahan Peluh |
| Penempatan Telinga | On Ear (Ear Clip) |
| Berat Barang | 1.95 auns (0.06 Kilogram) |
| Dimensi Produk | 0.98 x 0.98 x 0.98 inci |
Waranti dan Sokongan
Your Koss BT221i Wireless Bluetooth Ear Clip Headphones come with a Waranti Terhad Setahun. For warranty claims or technical support, please visit the official Koss webtapak atau hubungi bahagian perkhidmatan pelanggan mereka. Simpan bukti pembelian anda untuk pengesahan waranti.
Video Produk Rasmi
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.





