KOSS KSC21 ダイナミックオープンイヤホン,
| Control Method | Touch |
| Unit Count | 1.0 Count |
| Item Weight | 1.6 Ounces |
| Headphone Folding Features | On Ear |
| Earpiece Shape | Angled ear hook with over-ear cups |
| Headphones Ear Placement | On Ear |
| Color | Black |
| Wireless Technology | Bluetooth |
| Connectivity Technology | Wired |
| Headphone Jack | 3.5 mm Jack |
| Is Electric | No |
| Antenna Location | Running, Exercising |
| Compatible Devices | Devices with 3.5 mm audio jack |
| Cable Features | Retractable |
| Additional Features | noise-cancellation |
| Enclosure Material | Plastic |
| Specific Uses For Product | Sports and Exercise |
| Frequency Range | 20Hz - 20kHz |
| Audio Driver Type | Dynamic Driver |
| Frequency Response | 20000 Hz |
| Impedance | 26 Ohm |
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