Monster AC225 Open Ear Earbuds with Bluetooth 6.0, ENC Mic, 36H Playtime, IPX6 (Black)

Key takeaways

Open-ear earbuds aren’t for everyone, but when you want to hear your surroundings while still listening, the Monster AC225 makes a pretty clear case. They’re lightweight, use a clip-style open-ear fit, and are built around everyday comfort—so they’re easier to keep on for longer stretches than many traditional “seal-in” designs.

The sound story here is also specific: the AC225 uses 13 mm drivers and “directional” audio to aim sound toward your ears while limiting leakage. It won’t replace high-end noise-canceling headphones, but for casual music, workouts, and commuting, that trade-off can be worth it.

One more practical angle: call quality. With an improved ENC mic, these open-ear headphones are designed to reduce background noise—helpful if you’re talking on busy streets, in a gym, or outdoors when wind is around.

If you’re sensitive to earbuds that feel tight, or you like staying aware of what’s happening around you, it’s a strong fit. Just keep in mind open-ear designs generally won’t block the world like sealed earbuds do.

The essentials

The Monster AC225 are Bluetooth 6.0 open-ear earbuds with a lightweight clip-on, no-press approach. Each earbud weighs 5.1 g, and the adaptable bridge is meant to fit “any ear” without squeezing. In day-to-day use, that translates to less “hot spot” pressure during longer wear—something you notice fast when you switch from heavier headsets.

You also get touch controls for music and calls, including volume, play/pause, and answering or hanging up. There’s also support for voice assistants via simple taps. For a runner or someone walking to work, that matters because you’re less likely to fumble with a pocketed phone.

For power, Monster quotes up to 8 hours per charge and up to 40 hours total with the charging case, with 36 hours listed as playtime. In real shopping terms, that range suggests they’re positioned for “most of the week” style listening, depending on volume and usage.

What to know about sound, calls, and daily comfort

For music, the AC225 uses expansive 13 mm drivers with dual-composite diaphragms (as described) to target deeper bass and clearer treble. The directional audio approach is meant to deliver a more private listening experience by focusing sound toward you and reducing spill compared with looser, fully open setups.

If you’re taking calls, the included ENC mic is meant to cut down background noise, so your voice comes through more clearly. It’s not magic, though—open-ear earbuds still let in ambient sound, so in extremely loud environments you may still need to speak a bit closer to maintain clarity.

As for “staying aware,” the open-ear clip design is the point. Think of it like walking outside with one fewer barrier between you and your surroundings: you can hear announcements, foot traffic, or a cyclist approaching—while still getting your audio.

Key specifications

• Weight: 5.1 g per earbud
• Type: Open-ear, clip-on earbuds
• Bluetooth version: Bluetooth 6.0
• Battery life: Up to 8 hours per charge, up to 40 hours with charging case (playtime listed as 36 hours)
• Water resistance: IPX6 waterproof
• Microphone: ENC mic for clearer calls
• Controls: Touch control (music, calls, and voice assistant support)

Where it shines (and where it may fall short)

It’s a solid choice if you prioritize comfort, awareness, and quick control during movement. The clip-on open-ear design is especially appealing for workouts and travel, and the IPX6 rating helps if you sweat a lot or get caught in light rain.

It might not be the best match if you’re looking for maximum isolation or you strongly prefer earbuds that create a tight seal. Open-ear models usually can’t deliver the same “locked-in” sound experience as in-ear designs, and audio leakage can still be noticeable in very quiet settings.

Also, depends a bit on your environment: Bluetooth connectivity is described as stable with low latency, but the real-world performance will always vary with congestion and signal conditions.

Practical tips

A small fitting adjustment can make a big difference with clip-on open-ear earbuds. Before your first longer session, take a moment to align the bridge so it feels secure without needing pressure. Once they sit right, you’ll likely forget you’re wearing them.

For voice calls outdoors, try to face the direction you’re walking and speak at a normal distance—ENC is designed to reduce background noise, but wind and traffic can still overpower audio if you drift too far from the mic.

Final verdict

Should you buy it?

Buy the Monster AC225 if you want Bluetooth 6.0 open-ear earbuds that keep things comfortable (5.1 g each), help you stay aware of your surroundings, and offer an ENC mic for clearer calls. The IPX6 rating makes them more suitable for sweaty gym sessions and outdoor use than non-rated alternatives.

Skip them if you need strong noise blocking or expect a fully sealed, isolation-first audio experience. They’re more of a “wear all day, stay aware” product than a “disappear into music” product—and that distinction matters.

Quick FAQ

Common questions

• Are these earbuds open-ear or do they seal in your ear? They’re open-ear, clip-on earbuds designed to keep you aware of your surroundings.
• What does ENC mic do here? ENC is intended to reduce background noise for clearer calls, especially in busy or windy outdoor areas.
• How waterproof are they? They’re rated IPX6 waterproof for sweat and rain exposure.
• How long do they last on a charge? Monster lists up to 8 hours per charge and up to 40 hours total with the charging case (with 36 hours also stated as playtime).