---
product_id: 174331916
title: "Zerone Bluetooth Headset, K21 Business Headphones Wireless Earphones with Microphone Single Earpiece with Noise Reduction Mic"
brand: "zerone"
price: "132.38 DT"
currency: TND
in_stock: true
category: "Zerone"
url: https://www.desertcart.tn/products/174331916-zerone-bluetooth-headset-k21-business-headphones-wireless-earphones-with-microphone
store_origin: TN
region: Tunisia
---

# Ergonomic 180° rotating fit Bluetooth 5.0, 10m range 48h talk time, 70d standby Zerone Bluetooth Headset, K21 Business Headphones Wireless Earphones with Microphone Single Earpiece with Noise Reduction Mic

**Brand:** zerone
**Price:** 132.38 DT
**Availability:** ✅ In Stock

## Summary

> 🎧 Elevate your calls—power, comfort, and clarity in one sleek headset.

## Quick Answers

- **What is this?** Zerone Bluetooth Headset, K21 Business Headphones Wireless Earphones with Microphone Single Earpiece with Noise Reduction Mic by zerone
- **How much does it cost?** 132.38 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/174331916-zerone-bluetooth-headset-k21-business-headphones-wireless-earphones-with-microphone)

## Best For

- zerone enthusiasts

## Why This Product

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

## Key Features

- • **Unmatched Battery Life:** Stay connected with 48 hours of talk time and an ultra-long 70-day standby—charge less, do more.
- • **Ergonomic All-Day Comfort:** Designed for professionals on the move—snug over-ear fit with 180° adjustable earphone head for personalized comfort.
- • **Effortless One-Key Control:** Simplify your workflow with a multifunctional key that manages calls, music, and battery status with ease.
- • **Crystal Clear Noise Reduction Mic:** CVC noise cancellation ensures your voice cuts through any busy environment, perfect for calls on the go.
- • **Seamless Bluetooth 5.0 Connectivity:** Experience stable, lag-free calls and music up to 10 meters away with the latest Bluetooth tech.

## Overview

The Zerone K21 Bluetooth Headset combines cutting-edge Bluetooth 5.0 technology with a powerful 300mAh battery delivering up to 48 hours of talk time and 70 days standby. Its ergonomic over-ear design with a 180° rotating earphone ensures all-day comfort, while CVC noise reduction guarantees crystal-clear calls. Compatible with virtually all Bluetooth devices, this headset is perfect for busy professionals seeking reliable, long-lasting wireless audio with intuitive one-key controls.

## Description

The Bluetooth earphone with noise reduction mic will bring you crystal clear sound and guarantee a clear phone call even in noisy environment. Ideal for workout use and for driver/trucker to with people on the go. Amazing ultra long standby of up to 70 days, making that you do not have to frequently charge it if not use it very often. This wireless headset will add you more convenience and make your life more high-efficiency. You can check the remaining battery power on iOS device, like for iOS One multifunctional key for easier than conventional earphone with many control buttons. Unique CD-design, also comfortable to the touch. Ergonomically-shaped and over-the ear design for snug fit around your ear, cause no burden even after long-time wearing. The 180° rotating earphone head allows you to adjust the angle and fit this headset in right or left ear. Specifications: Color: Black Material: ABS + Silicone Connectivity: Bluetooth Bluetooth Version: 5.0 Range: 8-10 meters / 26.2-32.8 feet (open area) Music time: About 24 hours Call Time: About 48 hours Standby Time: About 70 days Charging Time: About 2.5 hours Battery Capacity: 300mAh Language: Chinese / English Product Size: Approx. 65 * 45 * 18 mm / 2.5 * 1.8 * 0.7 in Package Weight: About 85g Package List: 1 x Bluetooth Headset 1 x USB Charging Cable 2 x Replacement Earbud Tip (Other items in the pictures are not included.) Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.

## Features

- Built-in Large-capacity Battery: Supports more than 48 hours of talk time and ultra long standby of up to 70 days based on a single full charge which only takes about 2.5-hour charging.
- Wide Compatibility: This earphone is compatible with almost all Bluetooth-enabled cellphones, tablets and other devices.
- Convenient to Use: You can check the remaining battery power, one multifunctional key for easier than conventional earphone with many control buttons. Unique CD-design, also comfortable to the touch.
- Adopting Bluetooth 5.0 Technology: Enable stable signal and long working range of up to 8-10 meters in open area. CVC noise reduction technology maximizes signal quality for clearer and stabler phone call.
- Design: Ideal for sports and daily use, sweat will not affect the normal use of the headset. Ergonomically-shaped and over-the ear design for snug fit around your ear, cause no burden even after long-time wearing. The 180° rotating earphone head allows you to adjust the angle and fit this headset in right or left ear.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07C3X82JN |
| Additional Features | Microphone Included, sports-and-exercise, water-resistant, wireless |
| Age Range Description | Adult |
| Antenna Location | Calling, Exercising |
| Audio Driver Type | Dynamic Driver |
| Battery Average Life | 24 hours |
| Battery Charge Time | 2.5 hours |
| Best Sellers Rank | #173,578 in Electronics ( See Top 100 in Electronics ) #3,242 in Over-Ear Headphones |
| Bluetooth Range | 10 meters |
| Bluetooth Version | 5 |
| Brand Name | Zerone |
| Built-In Media | Cable, Replacement Earbud Tip |
| Cable Features | Without Cable |
| Color | Black |
| Compatible Devices | Cellphones, Tablets, Laptops, Desktops |
| Connectivity Technology | Wireless |
| Control Method | Touch |
| Control Type | Touch Control |
| Controller Type | Integrated |
| Customer Reviews | 3.9 3.9 out of 5 stars (44) |
| Earpiece Shape | Over-Ear, Hook |
| Enclosure Material | Acrylonitrile Butadiene Styrene (ABS), Silicone |
| Frequency Range | 20 Hz - 20,000 Hz |
| Headphone Folding Features | Over Ear |
| Headphone Jack | USB |
| Headphones Ear Placement | Over Ear |
| Manufacturer | Zerone |
| Model Name | Zeroneko04sgat19 |
| Model Number | Zeroneko04sgat19 |
| Noise Control | Active Noise Cancellation |
| Number of Items | 1 |
| Specific Uses For Product | Business |
| Style Name | Modern |
| Theme | Professional and Active Lifestyle |
| UPC | 654936821576 |
| Unit Count | 1 Count |
| Water Resistance Level | Waterproof |
| Wireless Technology | Bluetooth |

## Product Details

- **Brand:** Zerone
- **Color:** Black
- **Ear Placement:** Over Ear
- **Form Factor:** Over Ear
- **Noise Control:** Active Noise Cancellation

## Images

![Zerone Bluetooth Headset, K21 Business Headphones Wireless Earphones with Microphone Single Earpiece with Noise Reduction Mic - Image 1](https://m.media-amazon.com/images/I/618IjsKtBgL.jpg)

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**Shop now:** [https://www.desertcart.tn/products/174331916-zerone-bluetooth-headset-k21-business-headphones-wireless-earphones-with-microphone](https://www.desertcart.tn/products/174331916-zerone-bluetooth-headset-k21-business-headphones-wireless-earphones-with-microphone)

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-09-14*