---
product_id: 729343286
title: "KOSS KSC21 Dynamic Open Earphones,"
brand: "koss"
price: "S$37"
currency: SGD
in_stock: true
reviews_count: 13
category: "Koss"
url: https://www.desertcart.sg/products/729343286-koss-ksc21-dynamic-open-earphones
store_origin: SG
region: Singapore
---

# 20,000 Hz frequency response Enhanced game audio clarity Sporty open-ear design KOSS KSC21 Dynamic Open Earphones,

**Brand:** koss
**Price:** S$37
**Availability:** ✅ In Stock

## Summary

> 🎧 Hear More, Feel Free – The Open-Ear Revolution for Go-Getters

## Quick Answers

- **What is this?** KOSS KSC21 Dynamic Open Earphones, by koss
- **How much does it cost?** S$37 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/729343286-koss-ksc21-dynamic-open-earphones)

## Best For

- koss enthusiasts

## Why This Product

- Trusted koss brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Affordable Audio Upgrade:** Top-rated sound quality without breaking the bank—join thousands who upgraded their audio game.
- • **Lightweight & Secure Fit:** Sporty clip-on design at just 1.6 ounces keeps you moving without distractions.
- • **Crystal-Clear Audio Precision:** Experience rich sound up to 20kHz for every beat and detail.
- • **Universal 3.5mm Compatibility:** Plug and play with most smartphones, laptops, and MP3 players effortlessly.
- • **Open-Ear Comfort for Long Sessions:** Stay aware and comfortable during extended wear—perfect for work or workouts.

## Overview

The KOSS KSC21 Dynamic Open Earphones deliver crisp, 20,000 Hz frequency sound through a lightweight, sporty clip-on design. Compatible with any device featuring a 3.5mm jack, these wired earphones offer an open-ear experience ideal for gaming, exercising, and all-day wear. With a sensitivity of 101 dB and a detachable cable, they combine affordability with reliable performance, making them a favorite among active professionals seeking quality audio without compromise.

## Description

KOSS 175548 On-Ear Sports Clip Headphones

Review: 低コストで良好な音質。満足です。
Review: ゲームに使ってますが、今までのイヤホンでは聴こえなかった音も聴こえます。 長時間使っていると耳が痛くなりますが、耳への掛け方で対処できました。

## Features

- Manufacturer: KOSS

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004WD1F1O |
| Age Range (Description) | Adult |
| Amazon Bestseller | #22,290 in Electronics ( See Top 100 in Electronics ) #754 in Earbud & In-Ear Headphones |
| Cable Feature | Detachable |
| Color Name | Black |
| Compatible Devices | Most devices with 3.5mm audio jack, such as smartphones, laptops, MP3 players |
| Connectivity Technology | Wired |
| Control Method | Touch |
| Customer Reviews | 4.0 4.0 out of 5 stars (617) |
| Date First Available | November 3, 2011 |
| Frequency Response | 20000 Hz |
| Hardware Interface | 3.5mm Audio |
| Headphones Jack | 3.5 mm Jack |
| Included Components | Headphones |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.6 Ounces |
| Item model number | KSC21 |
| Material | Plastic |
| Material Type | Plastic |
| Model Name | KSC21 |
| Noise Control | None |
| Number of Items | 1 |
| Recommended Uses For Product | Exercising, Running |
| Sensitivity | 101 dB |
| Specific Uses For Product | Sport |
| Style | Sporty |
| Water Resistance Level | Not Water Resistant |
| Wireless Communication Technology | Bluetooth |

## Product Details

- **Brand:** Koss
- **Color:** Black
- **Ear Placement:** Open Ear
- **Form Factor:** In Ear
- **Impedance:** 26 Ohms

## Images

![KOSS KSC21 Dynamic Open Earphones, - Image 1](https://m.media-amazon.com/images/I/61F8pZ7PfoL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by い***り on December 21, 2025*

低コストで良好な音質。満足です。

### ⭐⭐⭐⭐ Review
*by ろ***ず on May 9, 2024*

ゲームに使ってますが、今までのイヤホンでは聴こえなかった音も聴こえます。 長時間使っていると耳が痛くなりますが、耳への掛け方で対処できました。

### ⭐⭐⭐⭐⭐ Review
*by う***い on October 26, 2025*

見た目が質素なのに 音質はプロフェッショナル!巧みのそれです KOSSの開発チームの耳が相当良いんでしょうね めちゃくちゃオススメです まずはお試しください。 これ以上言葉にすると感動が霞みます。 自分にとってはベストです。

## Frequently Bought Together

- Koss KSC21 SportClip Clip-On Headphones,Black
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- Audio Technica ATH-EQ300M PL Purple | Ear-Fit Headphones (Japan Import)

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**Shop now:** [https://www.desertcart.sg/products/729343286-koss-ksc21-dynamic-open-earphones](https://www.desertcart.sg/products/729343286-koss-ksc21-dynamic-open-earphones)

---

*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-05-25*