---
product_id: 638200435
title: "Open Free AC100 Open Ear Headphones, Bluetooth 5.3 Wireless Headphones with Earhooks, Immersive Stereo Sound by Dual Large Driver, Clear Talk, 30H Playtime,Waterproof Sport Earbuds for Running"
brand: "monster"
price: "₩96722"
currency: KRW
in_stock: true
reviews_count: 5
category: "Monster"
url: https://www.desertcart.kr/products/638200435-open-free-ac100-open-ear-headphones-bluetooth-5-3-wireless
store_origin: KR
region: South Korea
---

# 16mm dual large drivers for immersive stereo sound Bluetooth 5.3 for ultra-stable, 2X faster connection 30 hours total playtime with 6 hours per charge Open Free AC100 Open Ear Headphones, Bluetooth 5.3 Wireless Headphones with Earhooks, Immersive Stereo Sound by Dual Large Driver, Clear Talk, 30H Playtime,Waterproof Sport Earbuds for Running

**Brand:** monster
**Price:** ₩96722
**Availability:** ✅ In Stock

## Summary

> 🎧 Hear More, Feel Free — The Open-Ear Sound Experience You Can’t Miss!

## Quick Answers

- **What is this?** Open Free AC100 Open Ear Headphones, Bluetooth 5.3 Wireless Headphones with Earhooks, Immersive Stereo Sound by Dual Large Driver, Clear Talk, 30H Playtime,Waterproof Sport Earbuds for Running by monster
- **How much does it cost?** ₩96722 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/638200435-open-free-ac100-open-ear-headphones-bluetooth-5-3-wireless)

## Best For

- monster enthusiasts

## Why This Product

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

## Key Features

- • **Endurance for the Hustle:** 30 hours of uninterrupted playtime means your soundtrack keeps pace with your busiest days.
- • **AI Noise-Canceling Clarity:** Stay focused with smart dual-mic noise reduction that silences distractions in busy environments.
- • **Immersive Stereo Soundstage:** Dive into rich, crystal-clear audio powered by dual 16mm drivers that bring every beat to life.
- • **Open-Ear Comfort Revolution:** Experience all-day wear with zero ear canal fatigue—perfect for marathon workdays and workouts.
- • **Seamless Bluetooth 5.3 Connectivity:** Effortless pairing and ultra-stable wireless performance keep you connected without the wait.

## Overview

The Monster Open Free AC100 headphones combine cutting-edge Bluetooth 5.3 technology with an innovative open-ear design and dual 16mm drivers to deliver immersive stereo sound without ear fatigue. Featuring AI-powered noise cancellation, waterproof durability, and an impressive 30-hour battery life, these wireless sport earbuds are engineered for professionals who demand comfort, clarity, and endurance during work, workouts, and beyond.

## Description

Monster Open Free AC100 Open Ear Headphones, Bluetooth 5.3 Wireless Earbuds with Earhooks, Immersive Stereo Sound by Dual Large Driver, Clear Talk, 30H Playtime,Waterproof Sport Earbuds for Running

Review: I live this head set, works great without bugging my ears, only down side it only last just under 3 hrs for constant usage.
Review: Works really well. The sound quality is excellent, and I like Open Free, so you can hear the surroundings.

## Features

- 【Comfort Open-Ear】The Open-ear design of Air conduction earphones helps to achieve true painlessly and harmlessly. No need to put the earbuds in the ear canal, so ears will not feel sore and painful even listening to music for the whole day.
- 【Immersive Stereo Sound Effects】Monster Open Free AC100 Open Ear headphones dive into a world of sonic richness with the expansive soundstage delivered by 16mm large drivers. From deep bass to crisp highs, every nuance of music is brought to life with breathtaking clarity.
- AI Noise-canceling】Monster Open Free AC100 Open ear headphones have built-in AI noise-canceling technology and dual microphones, which adopt environmental noise reduction technology to monitor the sounds around you and instantly produce an opposite signal to reduce background noise. Whether you're in a bustling café or a busy office, background noise fades away, leaving only crystal-clear conversations.
- 【30H Ultra Long Playtime】These air conduction headphones boast an impressive total battery life of 30 hours, allowing for uninterrupted listening sessions throughout the day. With each individual use lasting up to 6 hours, these headphones provide the perfect blend of longevity and reliability. No more battery anxiety.
- 【Advanced Bluetooth 5.3】With advanced Bluetooth headphones 5.3 technology, you can get 2X fast transfer speed (75% higher than the previous generation) and a more stable connection. Wireless headphones will be paired with each other automatically, and just hit on Bluetooth list "Monster Open Free AC100" on your device to connect, avoiding complex operations and saving waiting time.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D2HS2JCX |
| Age range (description) | Adult |
| Best Sellers Rank | #99,057 in Electronics ( See Top 100 in Electronics ) #6,990 in In-Ear Headphones |
| Cable feature | Without Cable |
| Compatible devices | Bluetooth-enabled devices |
| Connectivity technology | Wireless |
| Control method | Remote |
| Control type | Media Control |
| Headphone jack | Without Jack |
| Included components | User Manual |
| Item model number | MH22156 |
| Item weight | 0.19 Kilograms |
| Manufacturer | Monster |
| Material | Silicone Plastic Thermoplastic Elastomer (TPE) |
| Model name | monster_open_free_ac100 |
| Number of Items | 1 |
| Package Dimensions | 13.31 x 11.4 x 4.9 cm; 191 g |
| Package type | FFP |
| Recommended uses for product | Running, Music |
| Specific uses for product | Sport |
| Style | black |
| Unit count | 1.0 Count |
| Water resistance level | Waterproof |
| Wireless communication technologies | Bluetooth |

## Product Details

- **Brand:** Monster
- **Colour:** Black
- **Ear placement:** Open Ear
- **Form factor:** Open Ear
- **Noise control:** Active Noise Cancellation

## Images

![Open Free AC100 Open Ear Headphones, Bluetooth 5.3 Wireless Headphones with Earhooks, Immersive Stereo Sound by Dual Large Driver, Clear Talk, 30H Playtime,Waterproof Sport Earbuds for Running - Image 1](https://m.media-amazon.com/images/I/71okiA+pQxL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by A***O on 24 November 2025*

I live this head set, works great without bugging my ears, only down side it only last just under 3 hrs for constant usage.

### ⭐⭐⭐⭐⭐ Review
*by S***C on 14 January 2026*

Works really well. The sound quality is excellent, and I like Open Free, so you can hear the surroundings.

### ⭐⭐⭐⭐⭐ Review
*by L***A on 1 March 2025*

These headphones are perfect for when you want to listen to music or talk but also be aware of your surroundings. These earphones also don’t go in your ear so you no longer have to worry about painful ears like with other ear buds. Even with everything said above they are noise cancelling in terms of unwanted noise. They are super comfy and do everything Monster says and more. 10/10

## Frequently Bought Together

- Monster Open Free AC100 Open Ear Headphones, Bluetooth 5.3 Wireless Headphones with Earhooks, Immersive Stereo Sound by Dual Large Driver, Clear Talk, 30H Playtime,Waterproof Sport Earbuds for Running
- Monster Open Free AC100 Open Ear Bluetooth 5.3 Headphones, Wireless Earbuds with Earhooks, Immersive Stereo Sound by 16mm Large Driver, Clear Calls, 30H Playtime, Waterproof Sport Earbuds for Running
- Monster Open AC601 Wireless Earbuds, Crystal Clear Call, USB-C Charging, Bluetooth 5.4 Open Earphones with ENC, IPX5 Waterproof Wireless Clip-on Earbud, 32H Playtime Earbuds (White)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-02-16*