Monster Open Ear AC221 E103 Clip-On Wireless Earbuds

Monster Open Ear AC221 E103 are clip-on true wireless earbuds with an open-ear fit, touch controls, and Bluetooth connectivity. The listing claims up to 8 hours per charge and 30 additional hours from the case, but the model identifier and some battery wording should be checked against the selected listing before purchase.

At a glance

Clip-on open-ear design is positioned for a fit that does not seal the ear canal.
The listing claims Bluetooth 6.0 and touch controls.
Battery claims specify up to 8 hours per charge and an additional 30 hours from the charging case.
The title and feature text claim IPX6, while the details field describes water resistance more generally.

Price

$31.99Save 78%

Reference price: ~~$142.99~~

Price checked: Nov 14, 2026

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Pros and cons

Pros

Open-ear placement may suit listeners who prefer not to use in-ear tips.
True wireless construction and touch control avoid a wired connection for playback and basic controls.
The claimed battery breakdown separates earbud use from the extra case capacity.

Cons

The open-ear design does not provide the sealed fit of conventional in-ear earbuds, which may not suit listeners seeking passive isolation.

Technical specifications

16 specifications

Identity
Brand	Monster
Model	E103
Color	E103 White
Ear placement	Open Ear
Form factor	True Wireless

Connectivity and controls
Wireless connection listed	Bluetooth
Bluetooth version	6
Control methods listed	Touch
Charging interface	USB Type C
Headphone jack	No Jack

Battery and protection
Earbud playback claim	up to 8 hours on a single charge
Additional charging-case playback claim	an additional 30 hours from the compact charging case
Water resistance listed	Water Resistant
Water-resistance rating claimed in title and feature text	IPX6

Physical details
Weight claim	4 grams

Package details
Manufacturer-listed contents	Cable, Monster Open Ear AC221 Earbuds x1, User Manual

What to know before buying

Listing details to confirm

Battery wording is inconsistent: the title says 30 hours of playback, while the feature text claims up to 8 hours per charge plus 30 additional hours from the case. The title names AC221, but the model fields give E103. The title and feature text claim IPX6, while the technical details only say Water Resistant. Confirm which model and listing details apply before buying.

What’s in the box

Included

Cable
Monster Open Ear AC221 Earbuds x1
User manual

Who is it for?

A good fit for

Listeners who want clip-on, open-ear true wireless earbuds rather than sealed in-ear buds.
People who prefer touch controls and USB Type-C charging, as listed.
Buyers considering use for exercise who want to review the listing's water-resistance claim and battery conditions.

Less suited to

Listeners who need a sealed earbud fit or passive isolation.
Buyers who require a confirmed, unambiguous model number, battery total, or water-resistance specification without checking the selected listing.

Monster Open Ear AC221 E103 Clip-On Wireless Earbuds · photo 2 — Additional product photo 2

Customer reviews on Amazon

5 / 5 · 2 ratings

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The supplied evidence contains only a small aggregate rating sample and no customer comments. That limited rating information cannot establish particular strengths, concerns, or performance outcomes, so it offers little basis for comparing comfort, calls, or battery life.

Frequently asked questions

What battery life does the listing claim?

The feature text claims up to 8 hours on one charge and an additional 30 hours from the charging case. The title's 30-hour playback wording is less specific, so confirm the claim for the exact listing.

Are these earbuds open-ear or in-ear?

They are listed as open-ear, with a clip-on design, rather than sealed in-ear earbuds.

What is the water-resistance rating?

The title and feature text claim IPX6, while the specification field says only Water Resistant. Treat the rating as a listing claim and check the selected product details.

Which model is this?

The title names AC221, while the model fields identify E103. The listing does not clearly reconcile those identifiers.