---
product_id: 334118320
title: "Zerone K21 Business Bluetooth Headset, Sweatproof Bluetooth Headphones Wireless V4.1 Business Earpiece with Noise Reduction Mic Earbuds for Office/Business/Workout"
brand: "zerone"
price: "€ 1.10"
currency: EUR
in_stock: false
reviews_count: 5
url: https://www.desertcart.ie/products/334118320-zerone-k21-business-bluetooth-headset-sweatproof-bluetooth-headphones-wireless-v4
store_origin: IE
region: Ireland
---

# Bluetooth V4.1 Sweatproof design Noise reduction mic Zerone K21 Business Bluetooth Headset, Sweatproof Bluetooth Headphones Wireless V4.1 Business Earpiece with Noise Reduction Mic Earbuds for Office/Business/Workout

**Brand:** zerone
**Price:** € 1.10
**Availability:** ❌ Out of Stock

## Summary

> Stay Connected, Stay Ahead! 🚀

## Quick Answers

- **What is this?** Zerone K21 Business Bluetooth Headset, Sweatproof Bluetooth Headphones Wireless V4.1 Business Earpiece with Noise Reduction Mic Earbuds for Office/Business/Workout by zerone
- **How much does it cost?** € 1.10 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/334118320-zerone-k21-business-bluetooth-headset-sweatproof-bluetooth-headphones-wireless-v4)

## 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

- • **Versatile Use:** Perfect for office calls, workouts, or on-the-go listening.
- • **Workout Ready:** Sweatproof design ensures durability during intense sessions.
- • **Crystal Clear Calls:** Noise reduction mic for professional-grade communication.
- • **Lightweight Comfort:** Designed for all-day wear without discomfort.
- • **Uninterrupted Connectivity:** Experience seamless audio with Bluetooth V4.1 technology.

## Overview

The Zerone K21 Business Bluetooth Headset combines advanced Bluetooth V4.1 technology with a sweatproof design, making it ideal for professionals who need reliable audio quality during calls and workouts. With a noise reduction mic, these earbuds ensure clear communication, whether in the office or on the move.

## 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 converse 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 operation 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 Transmission 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

- manufacturer: Zerone
- Item Trademark: ZERONE
- Item Category: Headphones

## Product Details

- **Brand:** Zerone
- **Colour:** Black
- **Ear placement:** In Ear
- **Form factor:** In Ear
- **Noise control:** Active Noise Cancellation

## Images

![Zerone K21 Business Bluetooth Headset, Sweatproof Bluetooth Headphones Wireless V4.1 Business Earpiece with Noise Reduction Mic Earbuds for Office/Business/Workout - Image 1](https://m.media-amazon.com/images/I/618IjsKtBgL.jpg)
![Zerone K21 Business Bluetooth Headset, Sweatproof Bluetooth Headphones Wireless V4.1 Business Earpiece with Noise Reduction Mic Earbuds for Office/Business/Workout - Image 2](https://m.media-amazon.com/images/I/51TOJu5uMNL.jpg)
![Zerone K21 Business Bluetooth Headset, Sweatproof Bluetooth Headphones Wireless V4.1 Business Earpiece with Noise Reduction Mic Earbuds for Office/Business/Workout - Image 3](https://m.media-amazon.com/images/I/61kNgc+CIZL.jpg)
![Zerone K21 Business Bluetooth Headset, Sweatproof Bluetooth Headphones Wireless V4.1 Business Earpiece with Noise Reduction Mic Earbuds for Office/Business/Workout - Image 4](https://m.media-amazon.com/images/I/613MpBnCvGL.jpg)
![Zerone K21 Business Bluetooth Headset, Sweatproof Bluetooth Headphones Wireless V4.1 Business Earpiece with Noise Reduction Mic Earbuds for Office/Business/Workout - Image 5](https://m.media-amazon.com/images/I/71M5cgczd+L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    Great quality
  

*by D***D on Reviewed in the United States on 22 October 2023*

Gave as a gift , they love it.

### ⭐⭐⭐⭐⭐ 







  
    Ótimo fone, ótimo custo benefício superou minhas expectativas.
  
  

*by M***A on Reviewed in Brazil on 11 June 2022*

O microfone é bem potente, ótimo volume e isola muito o som externo, vem com algumas borrachinhas para melhor ajustar no ouvido e o melhor é a bateria pois usei no escritório mais de uma semana ouvindo música mais de 8 horas e ainda participando de conferências.

### ⭐⭐⭐⭐⭐ 







  
  
    battery life is great
  

*by P***O on Reviewed in the United States on 23 April 2023*

For me it is all about the battery life and with this one it is all day and more. sound is clear but I'm usually listening to books on take so not sure about music. Comfortable so this one is perfect for me.

## Frequently Bought Together

- Zerone Bluetooth Headset, K21 Business Headphones Wireless Earphones with Microphone Single Earpiece with Noise Reduction Mic
- New bee Bluetooth Earpiece V5.0 Wireless Handsfree Headset 24 Hrs Driving Headset 60 Days Standby Time with Noise Cancelling Mic Headsetcase for iPhone Android Samsung Laptop Truck Driver, Gold
- NANAMI Bluetooth Headset, Bluetooth Earpiece V5.0, 320Hrs Ultralight Headphones with Rotatable Mic, Hands-Free Earphones, Noise Cancelling, in-Ear Earbuds for iPhone Android Cell Phone/Laptop/Trucker

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**Shop now:** [https://www.desertcart.ie/products/334118320-zerone-k21-business-bluetooth-headset-sweatproof-bluetooth-headphones-wireless-v4](https://www.desertcart.ie/products/334118320-zerone-k21-business-bluetooth-headset-sweatproof-bluetooth-headphones-wireless-v4)

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-28*