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Koss KSC21 SportClip Clip-On Headphones,Black
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Purchase options and add-ons
Brand | Koss |
Color | Black |
Ear Placement | On Ear |
Form Factor | On Ear |
Impedance | 26 Ohm |
About this item
- Wide-range frequency response
- Soft foam ear cushions
- Open, hear-through sound
- Frequency response - 20hz-20khz and impedance - 26 ohms
Additional Details


Competitively priced item
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This Item ![]() Koss KSC21 SportClip Clip-On Headphones,Black | Recommendations | |||||
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Price | $12.29$12.29 | $9.59$9.59 | $10.59$10.59 | $14.95$14.95 | $22.99$22.99 | $34.99$34.99 |
Delivery | — | Get it May 12 - 21 | Get it as soon as Saturday, Apr 26 | Get it as soon as Saturday, Apr 26 | Get it as soon as Saturday, Apr 26 | Get it as soon as Saturday, Apr 26 |
Customer Ratings | ||||||
Sold By | CONTINENTAL SUPPLY | Varsedark | Comerss | GeekriaDirect | leqingchun | Lui Woon |
connectivity tech | Wired | Wired | Ethernet | Wired | Wired | Wireless |
headphones form factor | On Ear | On Ear | Bi-fold | On Ear | Over Ear | On Ear |
connector type | 3 5mm Jack | 2.5mm Jack | — | — | — | wireless |
headphones jack | 3.5 mm Jack | 3.5 mm Jack | 3.5 mm Jack | 3.5 mm Jack | type-c | — |
cable feature | Retractable | Retractable | Retractable | — | — | Without Cable |
control type | — | Media Control | Media Control | — | Voice Control | Media Control |
water resistance | not water resistant | not water resistant | not water resistant | — | not water resistant | not water resistant |
material | Plastic | Stainless Steel | Nylon | Thermoplastic Elastomer (TPE) | Plastic | Plastic |
model name | 0 | W2U423546SENB3989NO0 | Earbud Headphones | EJL28 | Type-C906 | LK08 |
frequency range | 20Hz - 20kHz | 20 Hz - 20,000 Hz | — | 20 Hz - 20,000 Hz | 20 Hz - 20,000 Hz | [IN] 20 Hz - 20,000 Hz |
Product information
Noise Control | None |
---|---|
Frequency Response | 20000 Hz |
Headphones Jack | 3.5 mm Jack |
Connectivity Technology | Wired |
Wireless Communication Technology | Bluetooth |
Included Components | See Specs |
Age Range (Description) | Adult |
Material | Plastic |
Specific Uses For Product | Sports and Exercise |
Compatible Devices | Devices with 3.5 mm audio jack |
Cable Feature | Retractable |
Item Weight | 1.6 Ounces |
Water Resistance Level | Not Water Resistant |
Frequency Range | 20Hz - 20kHz |
Customer Package Type | Standard Packaging |
Unit Count | 1.0 Count |
Control Method | Touch |
Number of Items | 1 |
Audio Driver Type | Dynamic Driver |
Carrying Case Weight | 50 Grams |
Earpiece Shape | Angled ear hook with over-ear cups |
Is Autographed | No |
Series Number | 21 |
UPC | 021299175545 |
Manufacturer | Koss |
Product Dimensions | 7 x 3 x 0.75 inches |
Item Weight | 1.6 ounces |
Department | Unisex-Adult |
ASIN | B004WD1F1O |
Country of Origin | USA |
Item model number | KSC21 |
Customer Reviews |
4.2 out of 5 stars |
Best Sellers Rank | #71,788 in Electronics (See Top 100 in Electronics) #1,048 in On-Ear Headphones |
Is Discontinued By Manufacturer | No |
Date First Available | August 22, 2010 |
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Koss KSC21 SportClip Clip-On Headphones,Black
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What's in the box
Product Description
Koss 175548 on-ear sport clip headphones
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers find these headphones offer decent sound quality for their price and work well, particularly for audio books. The comfort and durability receive mixed feedback - while some find the clips comfortable and report they hold up well, others say the hard plastic clips are uncomfortable and the headphones fall apart within six months. Moreover, the ear support is problematic as the foam pads keep falling off, and customers disagree on the fit, with some finding them slim while others say they're too small. The clip quality also gets mixed reviews, with some saying they stay on well during exercise while others report issues with the clips detaching.
AI-generated from the text of customer reviews
Customers like the sound quality of these headphones, finding it good for the price and suitable for listening to audio books.
"...Though you can hear just fine, these allowed just enough ambient sounds that I could still listen for my kids if they called my name, cars coming,..." Read more
"...The sound quality is decent enough I can hear over coworkers in adjacent offices, even at low volumes (our walls are paper thin)...." Read more
"They are perfect? The volume is nice and it has good bass to them. They fit perfectly on my ears and I don't have to worry about my ears aching...." Read more
"...They work perfectly for my need and I am glad to have the added sound quality which was an upgrade from my last set...." Read more
Customers find these headphones offer good value for money, appreciating their quality relative to the price.
"...That my dears is how you do business! Great product, stellar customer service, fair price, it's a happy purchase you'll actually enjoy!" Read more
"...I didn't like the look of the more expensive Koss clip-on. This is pretty cheap, so I figure I will give it a shot...." Read more
"...They actually sound better than their audio technica counterpart. More low end with a fuller tone, and treble is not too harsh...." Read more
"...If I needed another pair, I would buy these again, for the value and the great sound." Read more
Customers find that the headphones work fantastically and continue to function well even after several months of use.
"...They work perfectly for my need and I am glad to have the added sound quality which was an upgrade from my last set...." Read more
"...Sound quality is great, and they work pretty well, especially when sleeping on my back...." Read more
"...and I wasn't able to get them back on, however... they do work fine without them...." Read more
"...One clip has come out a couple of times. They work fine, the sound is fine for my needs..." Read more
Customers have mixed opinions about the headphones' comfort, with some finding the clips and over-ear hooks comfortable, while others report that the hard plastic clips and earbuds hurt their ears.
"...I use them for everything now, as they stay on and can be moved for comfort... These are just a godsend, and exactly what I hoped for!..." Read more
"...Uncomfortable and accelerating the clip spreading out and worsening the already poorly fitting earphones' sound and fit...." Read more
"...They're comfortable enough that I forget I'm wearing them...." Read more
"...The volume is nice and it has good bass to them. They fit perfectly on my ears and I don't have to worry about my ears aching...." Read more
Customers have mixed experiences with the headphones' durability, with some reporting they held up since Christmas while others found them to be cheaply made and falling apart within six months of use.
"...The earpiece that goes over the back of the ear is hard and unforgiving...." Read more
"Good headphones. They clip around the ears easily and they stay in place well enough without becoming painful or annoying...." Read more
"...Recommended for sleeping with somewhat comfort but not for heavy use." Read more
"...recommend the over the ear panasonic ones, much better fit and are crazy durable." Read more
Customers have mixed opinions about the headphones' fit, with some finding them slim and comfortable, while others report they are too small and don't accommodate their ears properly.
"...these instead of of other styles because earbuds are painful and never fit right...." Read more
"...It's longer though it's missing the longer cord on one side that allows the user to put the cord behind the neck preventing things from catching..." Read more
"Love them. Small and comfortable. Don’t like in the ear headphones" Read more
"...The fit can't be adjusted at all like this, and they're very small...." Read more
Customers have mixed experiences with the clip quality of these headphones, with some reporting that they stay on well during activities, while others mention that they sometimes come off and aren't as sturdy as expected.
"Classic Koss value. For a price of cheap earbuds, you get a great clip-on earphone...." Read more
"...The earpiece that goes over the back of the ear is hard and unforgiving...." Read more
"...The clips stay on fairly well when running and exercising...." Read more
"...And for this price they are unbelievable! Now, he ear clips aren't great and they don't line up perfectly over my ears but they had a..." Read more
Customers report issues with the ear support of these headphones, noting that the foam pads fall off almost immediately and don't stay in place.
"...The ear clip edges are smooth and rounded. The foam covers used to come off a lot, but it's rarely a problem now...." Read more
"...The cost was reasonable, and overall I'm happy with them. The foam ear cushions came off the first week, and I wasn't able to get them back on,..." Read more
"Good headphones. They clip around the ears easily and they stay in place well enough without becoming painful or annoying...." Read more
"...of these is also better for travel, although the foam pads have a tendency to slip off and get lost. Good overall value." Read more
Reviews with images

Good Product, Slightly Different Look
Top reviews from the United States
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- Reviewed in the United States on February 10, 2017Size: One SizeProduct Packaging: Standard PackagingVerified PurchaseOk, so yeah, I got these to use with the PS4 mostly. I love playing No Man's Sky, but to hear the sound of things that want to hurt you VS the roar of your ship is a wild volume swing should you get in a starship battle... At night? I had two choices, either turn it up to stay alive or keep it down and die. I decided headphones were in order.
I chose to buy these instead of of other styles because earbuds are painful and never fit right.
On ear headphones squish your ears and head (especially if you wear glasses like I do).
I own a pair of Koss UR-20's that I adore, but they get so heavy after a while it's just uncomfortable. (This style being the giant over ear DJ style.)
The ones here that I bought, these little clip ons, are amazing! If you have issues with the other kinds like I do, you really do need these!
They are adjustable, light weight, and we'll padded. Though you can hear just fine, these allowed just enough ambient sounds that I could still listen for my kids if they called my name, cars coming, and my phone ring. This meant I could walk or jog safely with music without fear of not hearing traffic or dogs. I use them for everything now, as they stay on and can be moved for comfort... These are just a godsend, and exactly what I hoped for!
Also please know the seller is fantastic, within a very short time of purchase they had already emailed me, checked in, gave tips and contact info should anything be amiss, and offered assistance immediately should I need it. That my dears is how you do business!
Great product, stellar customer service, fair price, it's a happy purchase you'll actually enjoy!
- Reviewed in the United States on July 21, 2024Size: One SizeProduct Packaging: Standard PackagingVerified PurchaseI've had these since 2022, and I bought second pair for home use. I use them almost daily for remote appointments at work (up to 5 hours per day). The sound quality is decent enough I can hear over coworkers in adjacent offices, even at low volumes (our walls are paper thin). They're comfortable enough that I forget I'm wearing them. (I can't stand headband-style headphones with how they press on my head and ears. In-ear headphones hurt. Most clip-on headphones hurt.) The ear clip edges are smooth and rounded. The foam covers used to come off a lot, but it's rarely a problem now.
I'm buying a new pair because the piece that holds the clip in the hinge broke. I suspect this would have happened sooner if they spent much time unprotected in my backpack or purse. If I could just replace the broken part, I'd keep using them because the sound quality remains good.
Note: these are headphones only. There's no built-in mic.
- Reviewed in the United States on October 22, 2024Size: One SizeProduct Packaging: Standard PackagingVerified PurchaseThey are perfect? The volume is nice and it has good bass to them. They fit perfectly on my ears and I don't have to worry about my ears aching. They are also lightweight and the design is cute.
- Reviewed in the United States on June 4, 2018Size: One SizeProduct Packaging: Standard PackagingVerified PurchaseI bought these as a replacement when my Panasonic earphones of the same type died on me after almost a year. I'll be comparing the 2. I chose these because I had a gift card and was a little short to get the Panasonics again (really liked them!).
The Panasonic phones were thin whereas the Koss are at least twice as thick making them feel bulky and heavy. The earpiece that goes over the back of the ear is hard and unforgiving. I actually have to hook it in the stem of my glasses with some hair after a short time or it starts to hurt!
About the only thing I like BETTER about the Koss ones is the cord length. It's longer though it's missing the longer cord on one side that allows the user to put the cord behind the neck preventing things from catching it.
For a cheap pair of phones, these work but if you can spring for the Panasonics or better.
- Reviewed in the United States on December 19, 2014Size: One SizeProduct Packaging: Standard PackagingVerified PurchaseBought these to replace some very old headphones that fell apart after 10+ years, that being said these were a gamble to purchase. First out of the package they seem….. very small. However they fit secure on my ears and the sound quality is very good. I imagine anyone standing remotely close to me can hear what I am listening to, they feel like they stick far out from my ears. I wear mine while stationary biking so to overly concerned about fashion. They work perfectly for my need and I am glad to have the added sound quality which was an upgrade from my last set. Some reviewers mention the ear pieces snapping off? I do not see this being a problem for me, possibly a newer model?
- Reviewed in the United States on July 2, 2017Size: One SizeProduct Packaging: Standard PackagingVerified PurchaseClassic Koss value. For a price of cheap earbuds, you get a great clip-on earphone. The sound quality beats some of the more expensive headphones I have owned.
I was looking for a earphone with good bass, and I really like my portapro. I didn't like the look of the more expensive Koss clip-on. This is pretty cheap, so I figure I will give it a shot.
Overall, I am very impressed with the sound quality for the price. It is also very light and comfortable. Being headphone gives this clip-on bass unmatched by any earpubs at similar price range.
A few things I didn't like. The wire is kinda of thin and filmsy. Probably won't stand too much twisting. It also doesn't isolate outside nosie much. I want to be able to hear my surrounding in my case, so not a problem for me. However, it can be undesirable for some.
Button line: I love it. Unbelievable good cosidering the price.
Top reviews from other countries
- PReviewed in Canada on June 30, 2022
5.0 out of 5 stars Great fit
Size: One SizeProduct Packaging: Standard PackagingVerified PurchaseLove these small over the ear vs ear buds when lying in bed.
Sound is great and can lay on your side without the pressure from the earbuds digging into your brain :-)
Price was a little high, but great quality, sound and fit!
- Amazon CustomerReviewed in India on January 19, 2025
3.0 out of 5 stars Flaps become loose very soon
Size: One SizeProduct Packaging: Standard PackagingVerified PurchaseAudio quality is good for the price but flap became loose within months of purchase because of which it is unusable now.
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いくらちゃんReviewed in Japan on October 31, 2024
5.0 out of 5 stars 音サイコー
Size: One SizeProduct Packaging: Standard PackagingVerified Purchase外部音も聞こえるので重宝します
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PeterReviewed in the Netherlands on December 10, 2020
5.0 out of 5 stars Deze had ik eerder moeten hebben
Size: One SizeProduct Packaging: Standard PackagingVerified PurchaseEindelijk een clip-on met voldoende bass. Koss geluidskwaliteit! De KSC75 voor thuis, deze rakker voor on the road. Klein en licht. Ik draai veel dub met flinke lage tonen en deze geeft t fatsoenlijk weer. No brainer!
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G.GReviewed in France on November 8, 2016
4.0 out of 5 stars Bien pour moi
Size: One SizeProduct Packaging: Standard PackagingVerified PurchaseJ'utilise ces écouteurs pour une activité qui n'a rien avoir avec la musique donc je ne peux pas juger de la qualité du rendu mais ce sont des écouteurs dont je ne pourrai m'en passer pour mon utilisation.
Par contre le câble d'origine est bien évidemment trop fin et certainement assez tôt vous aurez des soucis avec. Je l'ai changé par du plus costaud et souder un jack de meilleur qualité (neutrik).