---
product_id: 644866481
title: "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, for Workout, Black"
brand: "monster"
price: "S$62"
currency: SGD
in_stock: true
reviews_count: 13
category: "Monster"
url: https://www.desertcart.sg/products/644866481-monster-open-free-ac100-open-ear-bluetooth-5-3-headphones
store_origin: SG
region: Singapore
---

# Fast charging support 16mm large dynamic driver 30H battery life 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, for Workout, Black

**Brand:** monster
**Price:** S$62
**Availability:** ✅ In Stock

## Summary

> 🎧 Stay connected, comfortable, and charged all day—hear the difference, feel the freedom!

## Quick Answers

- **What is this?** 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, for Workout, Black by monster
- **How much does it cost?** S$62 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/644866481-monster-open-free-ac100-open-ear-bluetooth-5-3-headphones)

## 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

- • **Open Ear Comfort:** Ergonomic earhooks and open-ear design deliver breathable comfort without ear fatigue.
- • **All-day Power Play:** Uninterrupted 30-hour battery life keeps you connected from dawn till dusk.
- • **Sweatproof & Ready:** Waterproof build and secure fit make these earbuds your ultimate workout companion.
- • **Crystal Clear Calls:** Advanced mic technology ensures your voice is heard loud and clear in every meeting.
- • **Immersive Stereo Sound:** 16mm large dynamic drivers provide rich, balanced audio for workouts and calls alike.

## Overview

The Monster Open Free AC100 are open-ear Bluetooth 5.3 wireless headphones featuring 16mm dynamic drivers for immersive stereo sound, a 30-hour battery life with fast charging, and a waterproof design with ergonomic earhooks. Perfect for professionals balancing long calls and active lifestyles, these earbuds deliver clear calls, breathable comfort, and reliable wireless connectivity.

## Description

desertcart.com: 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, for Workout, Black : Electronics

Review: Long lasting, great quality, and comfortable - Love these! I have small ears and struggle with finding in-ear ear buds that fit. I have hours of conference calls a day and over the ear headphones just make my ears sweat. However, these are the perfect! They fit nicely on my ears and are really comfortable. The sound quality and audio is great. And the battery lasts a long time. Great value for the money as well.
Review: It was a good deal. - Good clean sound and the mic is pretty good too.

## Features

- 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
- Headphones form factor: On Ear
- Special feature: Fast Charging
- Included components: User Manual
- Form factor: On Ear

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D2HS2JCX |
| Additional Features | Fast Charging |
| Age Range Description | Adult |
| Antenna Location | Running, Music |
| Audio Driver Size | 16 millimeters |
| Audio Driver Type | Dynamic Driver |
| Battery Average Life | 30 hours |
| Best Sellers Rank | #35,073 in Electronics ( See Top 100 in Electronics ) #1,803 in Earbud & In-Ear Headphones |
| Bluetooth Range | 10 meters |
| Bluetooth Version | 5.3 |
| Brand | Monster |
| Brand Name | Monster |
| Built-In Media | User Manual |
| Cable Features | Without Cable |
| Color | Black |
| Compatible Devices | Bluetooth-enabled devices |
| Connectivity Technology | Wireless |
| Control Method | Remote |
| Control Type | Media Control |
| Customer Package Type | FFP |
| Customer Reviews | 4.0 out of 5 stars 590 Reviews |
| Ear Placement | Open Ear |
| Earpiece Shape | earhook |
| Enclosure Material | Plastic |
| Form Factor | Open Ear |
| Frequency Range | 20 Hz - 20,000 Hz |
| Headphone Folding Features | Open Ear |
| Headphone Jack | No Jack |
| Headphones Ear Placement | Open Ear |
| Headphones Jack | No Jack |
| Manufacturer | Monster |
| Model Name | monster_open_free_ac100 |
| Model Number | MH22156 |
| Noise Control | Active Noise Cancellation |
| Number of Items | 1 |
| Series Number | 22156 |
| Specific Uses For Product | Sport |
| Style Name | black |
| UPC | 810079701032 |
| Unit Count | 1 Count |
| Water Resistance Level | Waterproof |
| Wireless Technology | Bluetooth |

## Product Details

- **Brand:** Monster
- **Color:** Black
- **Ear Placement:** Open Ear
- **Form Factor:** Open Ear
- **Noise Control:** Active Noise Cancellation

## Images

![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, for Workout, Black - Image 1](https://m.media-amazon.com/images/I/71okiA+pQxL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Long lasting, great quality, and comfortable
*by S***N on April 7, 2025*

Love these! I have small ears and struggle with finding in-ear ear buds that fit. I have hours of conference calls a day and over the ear headphones just make my ears sweat. However, these are the perfect! They fit nicely on my ears and are really comfortable. The sound quality and audio is great. And the battery lasts a long time. Great value for the money as well.

### ⭐⭐⭐⭐⭐ It was a good deal.
*by J***N on May 24, 2026*

Good clean sound and the mic is pretty good too.

### ⭐⭐⭐⭐ Well made!
*by J***S on November 26, 2025*

These are well made and work well. My only issue is that it is too large for my ears and often fall off. But the sound is impeccable. It was easy to connect to my phone. Charge lasts a long time.

## 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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**Shop now:** [https://www.desertcart.sg/products/644866481-monster-open-free-ac100-open-ear-bluetooth-5-3-headphones](https://www.desertcart.sg/products/644866481-monster-open-free-ac100-open-ear-bluetooth-5-3-headphones)

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-08-06*