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Price: $22.49
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In Stock: 78
Last Updated: Nov 20, 2025
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Enjoy high fidelity sound quality while remaining connected to the outside world with the Koss KSC21 sport clip headphones. These over-the-ear headphones deliver a wide-range, extended frequency response through soft, foam ear cushions that guarantee an open, hear-through sound. When you choose the KSC21, you're rewarded with the comfort of pivoting ear plates, and the great, crisp and clean Sound of Koss.
Main Specification
| General Information | |
| Manufacturer | Koss Corporation |
| Manufacturer Part Number | KSC 21 |
| Manufacturer Website Address | http://www.koss.com |
| Brand Name | Koss |
| Product Model | KSC21 |
| Product Name | KSC21 Ear Clip Headphones |
| Product Type | Headphone |
| Technical Information | |
| Connectivity Technology | Wired |
| Cable Length | 4 ft |
| Sound Mode | Stereo |
| Impedance | 36 Ohm |
| Minimum Frequency Response | 50 Hz |
| Maximum Frequency Response | 18 kHz |
| Features | Comfortable |
| Earpiece | |
| Earpiece Design | Over-the-ear |
| Earpiece Type | Binaural |
| Earpiece Sensitivity | 101 dB |
| Interfaces/Ports | |
| Host Interface | Mini-phone (3.5mm) |
| Physical Characteristics | |
| Product Material | Foam |
| Form Factor | Supra-aural |
| Weight (Approximate) | 1.20 oz |
| Warranty | |
| Limited Warranty | Lifetime |
WARNING:: The plastic used in cable products can expose you to lead and lead components,
chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
For more information go to www.P65Warnings.ca.gov
