--- 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: "¥9642" currency: JPY in_stock: true category: "Monster" url: https://www.desertcart.jp/products/644866481-monster-open-free-ac100-open-ear-bluetooth-5-3-headphones store_origin: JP region: Japan --- # 16mm Dual Dynamic Drivers 30H Playtime with Fast Charging Waterproof & Secure Earhooks 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:** ¥9642 **Availability:** ✅ In Stock ## Summary > 🎧 Elevate your workout soundtrack without missing a beat! ## 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?** ¥9642 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/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 Design:** Experience your surroundings safely while enjoying music—perfect for workouts and outdoor runs. - • **Secure Fit Earhooks:** Engineered for active lifestyles, these earbuds stay put no matter how intense your session. - • **All-Day Battery Life:** Stay unplugged longer with an impressive 30 hours of continuous playtime and rapid recharge. - • **Immersive Stereo Sound:** Feel every beat with powerful 16mm dual drivers delivering crystal-clear audio. - • **Bluetooth 5.3 Connectivity:** Seamless, low-latency wireless connection up to 10 meters for uninterrupted calls and music. ## Overview The Monster Open Free AC100 are open-ear Bluetooth 5.3 wireless earbuds featuring 16mm dual dynamic drivers for immersive stereo sound, a secure earhook design ideal for sports, waterproof durability, and an impressive 30-hour battery life with fast charging—engineered to keep you connected and aware during workouts. ## 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 ## 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 | | Best Sellers Rank | #72,373 in Electronics ( See Top 100 in Electronics ) #3,009 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 593 Reviews | | Ear Placement | Open Ear | | Earpiece Shape | earhook | | Enclosure Material | Plastic | | Form Factor | Open Ear | | 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) ![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 2](https://m.media-amazon.com/images/I/8161dnOzRKL.jpg) ![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 3](https://m.media-amazon.com/images/I/71B5BKAJBgL.jpg) ![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 4](https://m.media-amazon.com/images/I/716kLuytWfL.jpg) ![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 5](https://m.media-amazon.com/images/I/715l6Ve4ZNL.jpg) ## 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) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/644866481-monster-open-free-ac100-open-ear-bluetooth-5-3-headphones](https://www.desertcart.jp/products/644866481-monster-open-free-ac100-open-ear-bluetooth-5-3-headphones) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-13*