Monster Open Ear AC328 Wireless Earbuds - 32H Playtime, Lightweight

In this review of the Monster Open Ear AC328 Wireless Earbuds, the bottom line is simple: these are best for anyone who wants long battery life and open, comfortable listening during active use. The open ear design reduces pressure on the eardrum and lets users stay aware of their surroundings, while the 32 hours of combined playback and the Type-C charging make them practical for travel, workouts, and long days. Call clarity and a wide soundstage from the 14.2mm drivers round out an experience aimed at comfort and endurance rather than deep passive isolation.

Key Features

• Open Ear Design: Allows sound to enter naturally so users can listen for long periods with reduced eardrum pressure and increased situational awareness.
• Call Noise Reduction: Built-in ENC technology reduces background noise during calls to provide clearer, face-to-face like conversations on the move.
• Pure Monster Sound: A 14.2mm driver delivers a wide, dynamic sound range tuned by Monster's R&D team to keep music full and engaging.
• Ultra Long Battery Life: Up to 32 hours of continuous playback or call time from a full charge, reducing the need for frequent recharges during travel or workouts.
• Bluetooth 6.0: Advanced Bluetooth 6.0 provides a stable, low-latency connection up to 10 meters for reliable wireless listening.
• Lightweight Portability: Compact, ergonomic construction makes the earbuds easy to carry and comfortable for extended wear during exercise or daily use.

Who It's For

These earbuds are a good fit for runners, cyclists, commuters, and anyone who needs to remain aware of their surroundings while listening. The open ear format and lightweight build make them particularly suited to outdoor workouts where hearing environmental cues matters and long battery life is a practical benefit.

They are less appropriate for listeners who want full noise isolation or extremely bass-forward home listening, since the open ear approach trades sealed immersion for comfort and awareness. If you need passive isolation for flights or noisy offices, a closed in-ear or over-ear option would be better.

Pros & Cons

Pros

• Comfortable open ear fit that reduces ear pressure and supports long listening sessions.
• Exceptional battery life with up to 32 hours of playback, ideal for travel and long workouts.
• Clear calling experience thanks to ENC noise reduction and reliable Bluetooth connectivity.
• Lightweight, portable design that stays comfortable during exercise.

Cons

• Open ear format does not provide passive noise isolation, so bass may feel less pronounced compared with in-ear sealed models.

Specifications

Design	Open ear headphones
Driver	14.2mm diameter speaker
Battery Life	Up to 32 hours playback/call time
Bluetooth	Bluetooth 6.0, up to 10 m range
Charging	USB Type-C
Water Resistance	Water resistant design for sports

Our Verdict

The Monster Open Ear AC328 earbuds are a strong choice for active users who prioritize comfort, long battery life, and clear calls while remaining aware of their environment. They deliver balanced, dynamic sound from a 14.2mm driver and reliable Bluetooth connectivity, making them good value for workouts, commuting, and outdoor use where situational awareness matters.

Frequently Asked Questions

Do these earbuds block outside noise?
They use an open ear design, so they do not provide passive noise isolation and allow ambient sound for safety and awareness.

How long does the battery last on a single charge?
Combined playback and call time reaches up to 32 hours after a full charge with the built-in battery and charging case design.

Are they suitable for exercise in light rain?
The design is water resistant for sports, so they tolerate sweat and light moisture, but heavy exposure to water should be avoided.