Ọrọ Iṣaaju
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.
Ohun ti o wa ninu Apoti
- Koss BT221i Wireless Bluetooth Ear Clip Headphones
- Itọsọna olumulo
- Okun gbigba agbara (USB Micro)
- Clip Management USB
Ọja Pariview

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.
Ṣeto
Ngba agbara si Awọn Agbekọri
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.
Asopọ Bluetooth
- Rii daju pe awọn agbekọri ti wa ni pipa.
- 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.
- Lori ẹrọ Bluetooth ti o ṣiṣẹ (foonuiyara, tabulẹti, ati bẹbẹ lọ), lọ si awọn eto Bluetooth ki o tan-an Bluetooth.
- Wa fun 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.
Awọn ilana Iṣiṣẹ
Wọ Awọn Agbekọri
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.

olusin 5: A alaye view of the pivoting ear clip, designed for a secure and adjustable fit.
Basic Controls (In-Line Remote)
| Bọtini / Action | Išẹ |
|---|---|
| Olona-iṣẹ Button (Aarin) |
|
| Iwọn didun soke (+) |
|
| Iwọn didun isalẹ (-) |
|
Ṣiṣe ati Gbigba Awọn ipe
When connected to your smartphone, you can use the in-line remote to manage calls:
- Si dahun ipe ti nwọle, short press the multi-function button.
- Si fopin si ipe ti nṣiṣe lọwọ, short press the multi-function button.
- Si kọ ipe ti nwọle, press and hold the multi-function button for 2 seconds.
- The built-in microphone ensures clear voice transmission during calls.
Itoju
- Ninu: Mu awọn agbekọri nu pẹlu asọ ti o gbẹ. Maṣe lo awọn kẹmika lile tabi awọn ohun elo abrasive.
- Resistance lagun: The headphones are sweat-resistant, making them suitable for workouts. However, avoid submerging them in water.
- Ibi ipamọ: 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.
Laasigbotitusita
| Isoro | Ojutu |
|---|---|
| Awọn agbekọri ko tan. | Rii daju pe awọn agbekọri ti gba agbara ni kikun. Sopọ si orisun agbara ati ṣayẹwo itọkasi gbigba agbara. |
| Ko le so pọ pẹlu ẹrọ. |
|
| Ko si ohun tabi iwọn kekere. |
|
| Uncomfortable fit or ear pads falling off. |
|
Awọn pato
| Ẹya ara ẹrọ | Ẹ̀kúnrẹ́rẹ́ |
|---|---|
| Orukọ awoṣe | BT221i Bluetooth Wireless Headphones |
| Ẹya Bluetooth | 4.2 |
| Igbesi aye batiri | 6+ wakati |
| Akoko gbigba agbara | Approx. 1.5 hours (from customer review) |
| Iṣakoso Iru | Iṣakoso iwọn didun, Latọna jijin |
| Gbohungbohun | Gbohungbohun inu ila |
| Omi Resistance | Resistant lagun |
| Gbigbe Eti | On Ear (Ear Clip) |
| Iwọn Nkan | 1.95 iwon (0.06 kilo) |
| Ọja Mefa | 0.98 x 0.98 x 0.98 inches |
Atilẹyin ọja ati Support
Your Koss BT221i Wireless Bluetooth Ear Clip Headphones come with a Atilẹyin ọja Odun kan. For warranty claims or technical support, please visit the official Koss webojula tabi kan si wọn onibara iṣẹ Eka. Jeki ẹri rira rẹ fun ijẹrisi atilẹyin ọja.
Official ọja Video
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.