Monster AC520 E93 Open-Ear True Wireless Headphones

Monster AC520 E93 open-ear headphones are true-wireless earbuds with touch controls and a charging case. The listing claims up to 8 hours per charge and 24 hours with the case, while another detail gives a general 24-hour battery-life figure. Their open-ear format is intended for listening while remaining aware of nearby sounds, rather than isolating you from ambient noise.

At a glance

Open-ear design lets ambient sounds remain audible during listening, according to the listing.
The feature description claims up to 8 hours on one charge and up to 24 hours with the charging case.
A slide-open case design and removable lanyard are described in the feature copy.
Bluetooth connection and touch controls are listed.

Price

$32.99Save 76%

Reference price: ~~$139.99~~

Price checked: Nov 14, 2026

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Pros and cons

Pros

Open-ear placement suits listeners who want to hear nearby conversations and environmental sounds while listening.
A charging case and Type-C charging cable are listed in the package contents.
The listing describes touch controls and a built-in microphone for calls.

Cons

Open-ear placement does not provide the passive isolation of sealed in-ear headphones, so surrounding noise can compete with audio.

Technical specifications

22 specifications

Identity
Brand	Monster
Model	E93
Color	Purple E93

Fit and audio
Ear placement	Open Ear
Form factor	True Wireless
Earpiece shape	Oval
Driver type	Dynamic Driver
Driver size	40 millimeters
Impedance	32 ohm
Frequency response	20 hertz

Connectivity and controls
Wireless connection listed	Bluetooth
Bluetooth version	6
Bluetooth range	33 feet
Control methods listed	Touch
Microphone	Bluetooth Connectivity, Microphone Included
Headphone jack	No Jack

Power and battery
Battery life listed	24 hours
Charge time	2 hours

Materials and protection
Enclosure material	Plastic
Water resistance listed	Not Water Resistant

Compatibility and use
Compatible devices	Compatible with any Bluetooth-enabled device,such as computers, smartphones or tablets, MP3 Player, TV, Laptop
Cable	Detachable

What to know before buying

Listing details to confirm

Battery details are inconsistent: a general specification says 24 hours, while feature copy says up to 8 hours on one charge and up to 24 hours including the case. The listing also claims IPX6 water resistance and sweat/rain use, but the water-resistance field says Not Water Resistant. Confirm the intended protection rating and runtime conditions for the selected listing before relying on either claim.

What’s in the box

Included

Monster Open Ear AC520 headphones (1)
Type-C charging cable (1)
User manual
Wireless charging case

Who is it for?

A good fit for

Listeners who prefer an open-ear design that keeps nearby sounds audible.
People seeking true-wireless Bluetooth earbuds with touch controls for compatible devices.

Less suited to

Listeners who need noise isolation or dependable blocking of surrounding sound.
Buyers who need an unambiguous water-resistance rating or battery-runtime specification.

Monster AC520 E93 Open-Ear True Wireless Headphones · photo 2 — Additional product photo 2

Customer reviews on Amazon

5 / 5 · 3 ratings

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4 stars0%0%
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The supplied evidence contains only aggregate ratings, with a very small rating sample and all recorded ratings in the five-star category. That offers little detail about fit, call quality, sound, or the conflicting battery and water-resistance claims, so it is not enough to establish how the headphones perform in those areas.

Frequently asked questions

How long does the battery last?

The feature description claims up to 8 hours from a charge and up to 24 hours with the charging case. A separate specification lists 24 hours without explaining the operating conditions, so treat runtime as unclear.

Are these headphones water-resistant?

The listing conflicts: feature copy claims IPX6 resistance and use in sweat or rain, while the technical water-resistance field says Not Water Resistant. Confirm the rating before using them around water.

Do they block outside noise?

No noise-control feature is listed, and the open-ear design is described as allowing surrounding sounds to be heard. They are not presented as noise-isolating headphones.

What comes in the package?

The package list names the headphones, one Type-C charging cable, a user manual and a wireless charging case.