Monster Open Ear AC339 E98 Bluetooth Headphones

Monster Open Ear AC339 E98 headphones use an open-ear design with Bluetooth connectivity and touch controls. The listing also claims up to 40 hours of playback and IPX6 water resistance, but its model naming and Bluetooth version details are inconsistent, so confirm the exact listing configuration before buying.

At a glance

Open-ear, clip-on style is described in the product title and details.
Touch control is listed for handling functions such as calls and music.
The feature copy claims up to 40 hours of playback and a digital battery-level display.
The listing describes IPX6 water resistance. This is a manufacturer claim, not an independently verified rating.

Price

$35.99Save 64%

Reference price: ~~$99.99~~

Price checked: Nov 13, 2026

View offer Ahead of Black FridayExplore the selection

Often bought together

Monster AC228 Open Ear Headphones, Bluetooth 6.0 Clip-On Earbuds, Adaptive Comfort, IPX5 Water Resistant, 30H Playtime - Black

$43.99

Pros and cons

Pros

Open-ear fit keeps the ear canal uncovered, which may suit listeners who prefer not to use in-ear tips.
Touch controls are listed, and the feature copy describes call and music management.
A battery-level display is claimed, which could make remaining charge easier to check.

Technical specifications

7 specifications

Identity
Brand	Monster
Model	E98

Connectivity and controls
Wireless connection listed	Bluetooth
Control methods listed	Touch

Design
Form factor	Open ear
Colour	Black

Protection
Water resistance listed	Water Resistant

What to know before buying

Listing details to confirm

The listing is inconsistent about product identity and Bluetooth version: its title calls the headphones AC339 and Bluetooth 6.0, while the model fields identify E98 and the Bluetooth version field says "6". The exact Bluetooth specification and model correspondence are unconfirmed. The up-to-40-hour playback claim has no stated test conditions, and the IPX6 statement appears in promotional copy while the technical field only says "Water Resistant". Confirm the selected listing details if these distinctions matter.

Who is it for?

A good fit for

Listeners seeking open-ear wireless headphones with touch controls.
Buyers who value a claimed long playback time and an on-device battery display.

Less suited to

Listeners who need a verified Bluetooth version or clearly reconciled model designation before purchase.
Buyers who require documented playback conditions or a precise water-resistance specification in the technical details.

Monster Open Ear AC339 E98 Bluetooth Headphones · photo 2 — Additional product photo 2

Customer reviews on Amazon

5 / 5 · 2 ratings

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Only aggregate ratings are supplied, with all recorded ratings in the five-star category. This very small rating sample offers little basis for predicting fit, sound, battery performance or durability, and no written customer feedback is available.

Frequently asked questions

What model is listed for these headphones?

The title identifies them as Monster AC339, while the model fields identify E98. The listing does not explain whether these names refer to the same product, so confirm the selected listing before ordering.

What Bluetooth version do they use?

The title claims Bluetooth 6.0, but the technical Bluetooth version field states "6". The exact version is therefore unclear from the supplied listing details.

How long does the battery last?

Promotional copy claims up to 40 hours and mentions a digital battery-level display. It does not specify the conditions for the playback claim.

Are the headphones waterproof?

The feature copy claims IPX6 water resistance, but the technical details say only "Water Resistant". Treat the precise protection rating as unconfirmed in the listing details.