Koss BT221i Wireless Bluetooth Ear Clips, In-Line Microphone
Specifications
- Product Dimensions
0.98 x 0.98 x 0.98 inches - Item Weight
2.29 ounces - Batteries
1 Lithium Polymer batteries - Connectivity Technology
Wireless - Form Factor
Over Ear - Support Standard
802.15.1 - Frequency Range
2402-2480MHz - Brand
Koss
Introduction
Modern Bluetooth® hardware and software are featured in the Koss Wireless Bluetooth® On-Ear Clip Headphones. With a battery life of up to 6+ hours, an in-line microphone, and a remote for playing and answering calls, listeners can stay connected.
Bluetooth Discovery Mode
To enter Bluetooth discovery mode, from an off state, depress and hold the center button until the light flashes red and blue.
Select “Koss BT221i” on the transmitting device to pair
Bluetooth Paired
When the indicator light flashes blue once every 5 seconds, the device is paired with Bluetooth.
Charging
Controls
Ports

Light Language
Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception. which.can be. determined by turning the equipment off and on, the user is encouraged to try to correct the int Copyfish
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from th
- Consult the dealer or an experienced radio/TV technician for help.
This device complies with part 15 of the FCC rules and Industry Canada license-exempt RSS standard(s).
Operation is subject to the following two conditions:
- this device may not cause interference, and
- this device must accept any interference, including interference that may cause undesired operation of the device.
WARNING
Please read these safety warnings carefully to ensure your personal safety and prevent property damage.
- Do not leave your devices in close proximity to open flames or extreme sources of heat.
- Do not expose your devices to liquid or extreme humidity.
- Do not drop, disassemble, microwave, incinerate or paint your devices.
- Do not expose your devices to extremely high or low temperatures.
- Clean your devices with a clean, dry cloth.
- Do not leave your devices in direct sunlight for an extended period of time.
- Do not dispose of your devices in a fire. The battery could explode causing injury or death.
- Do not attempt to clean your devices while they are being charged.
- Only charge your devices with the components supplied with the devices.
- Do not attempt to disable the devices, chargers or cables or force open the built-in battery
- Do not charge your devices in damp areas or in extremely high or low temperatures.
- Do not leave or store the devices or any of their accessories near or over your automobiles
KOSSS stereophones
Koss Corporation4129 N. Port Washington Ave. Milwaukee, WI 53212/USA 1-800-USA-KOSS (1-800-872-5677 Koss-UK Ltd., Registered Office Address
One New Change, London, EC4M 9AF/UK For warranty information visit www.kos.com
Caution
Use the product in an environment with a temperature Between-10 C and 45 C; Otherwise, it may damage your phone. It can be operated under 2000m. For the following equipment:
- Product Name
Bluetooth Headset - Brand Name
KOSS - Model
Koss BT221i
Koss Corporation hereby declares that this [Name: Bluetooth Headset, Model: Koss BT221i] is in compliance with the essential requirements and other relevant provisions or directives 2014/53/EU.
The product shall only be connected to a USB interface of version USB2.0 or higher. connection to a power USB is allowed. This product can be used across EU member states.
CAUTION
RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS.
- Do not use other unauthorized chargers or power supplies for charging.
- Do not use the product in an environment below -10C or above 45 C for charging.
FCC RF Exposure Warning
The device has been evaluated to meet general RF exposure requirements. The device can be used in portable exposure conditions without restriction.
ISED RF Exposure Warning
This radio transmitter (ISED certification number: 10021A-BTO001) has been approved by Industry Canada to operate with the antenna types listed with the maximum permissible gain indicated. Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited for use with this device.
Frequently Asked Questions
- Are they good for running or will they fall off too easily?
They don’t good for running but good sound. - Will all of the functions of the in-line microphone & remote work with Spotify on an Android phone?
Yes, the in-line mic and remote will work with any smartphone when paired via Bluetooth. You can even double tap the power button to activate SIRI and Google Assistant. - Where do I get replacement ear pads for the BT221i headphones?
The pads falling off is a major problem with this item. I bought 2 of them and both pads from both pairs fell off within 2 weeks. I had to super glue them on the outer rims for them to stay in place. This model the only padded earclip Bluetooth headphones I’ve ever seen, and I’ve checked around, so I don’t think there are any other padded earclip headphone types like this that are actually Bluetooth.
- My headphones connect and disconnect constantly so there is always beeping. Is there something I need to fix or do they need to be replaced?
I don’t know if it can be fixed so I refunded mine. - Similar product without wires? Bluetooth earbuds don’t have wires but give me a headache (not bc volume). looking for *over-ear, *ear clip, *wireless?
These are actually the only Bluetooth ear clip headphones I could find on Amazon. I have not checked eBay. Sadly, they are a terrible product. The foam pads slip off easy, and I had to repair them with super glue to make them stay on. The pads fell off within the first week of owning them. Battery lasts only 4-6 hours, so I bought 2 pairs together. The included USB charging cable gets a really bad connection to the input bar on the headphones so I had to use the charger from another device for a better fit in the port. Takes 3-4 hours to charge the battery, too. Then the cables between the headphones frayed within 4 months to where all sound was lost. All these problems happened with both pairs in the same exact ways almost at the exact same time. I’m very careful with my things and they still broke like a plastic toy out of a Mcdonald’s Happy Meal. I recommend staying away from this product. Absolutely horrible. - Can they be paired to more than one source?
Yes. Just like any other blue tooth device you can pair it with as many devices as you like. Mine is paired to at least 4 devices. But you can only connect to one device at a time. These headphones are great! You won’t be disappointed. I am an audiophile and for the price, you aren’t going to find a better pair. I’ve purchased many trying to be satisfied with the sound quality and these are the best I’ve found without spending a small fortune. - My computers are unable to locate this device. Is this a common issue?
I also had that problem, and I found the audio for the music wasn’t very good. - Will these work with a kindle fire HD10 or a kindle paperwhite?
I am sorry I can’t say for certain, but they are Bluetooth connective; so I don’t know why they shouldn’t work. - Can you get replacement ear pads that fit these?
Yeah. I’m not sure where but you can find replacement ear pads. They normally come in a pack of six.