Karthus R11-DR Rechargeable OTC Hearing Aids

Karthus R11-DR hearing aids are rechargeable behind-the-ear devices with button control and two claimed listening modes. The listing describes use for mild to moderate hearing loss and reports up to 30 hours per charge or 100 hours with the case, but does not specify conditions for those battery figures.

At a glance

The listing claims up to 30 hours of listening per charge and up to 100 hours with the charging case.
Two stated listening modes target quiet settings and noisier environments.
The listing says operation requires no app, Bluetooth or wireless function.
The listed package contents are two hearing aids, a charging case and a user manual.

Price

$199.99Save 55%

Reference price: ~~$439.99~~

Price checked: Nov 14, 2026

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Pros and cons

Pros

Button-based operation and no app requirement suit buyers who prefer straightforward controls.
The behind-the-ear fit and listed pair provide a familiar two-ear format.
The included charging case is part of the stated kit and supports the claimed extended total listening time.

Cons

No Bluetooth or wireless function is stated, so these are not suitable for buyers seeking wireless streaming or app control.

Technical specifications

13 specifications

Identity
Brand	Karthus
Model	R11-DR
Color	Piano Black

Design and controls
Fit	Behind-the-Ear
Special features	Lightweight, Rechargeable
Control type	Button Control
Items	2

Power and battery
Battery type	Lithium Ion
Battery description	Lithium-Ion
Battery voltage	3.7 volts
Battery weight	6.8 g
Batteries required	3 Lithium Ion batteries required. (included)

Claimed use and operation
Recommended uses	Clear conversations, watching TV, outdoor activities

What to know before buying

Listing details to confirm

The title claims noise reduction, while the detail field says noise control is “None.” The features also describe noise reduction and a Noise Mode, so noise-control capability is inconsistent in the listing. Battery duration figures are manufacturer claims with no stated test conditions. Confirm these details if they are important to your choice.

What’s in the box

Included

2 hearing aids
Charging case
User manual

Who is it for?

A good fit for

Buyers seeking rechargeable, behind-the-ear hearing support with physical button control.
People interested in hearing support for conversations and TV who do not need app or Bluetooth features.

Less suited to

Buyers who need Bluetooth streaming, wireless connectivity or app-based adjustments.
Anyone who requires confirmed noise-reduction performance or clearly specified battery-test conditions.

Karthus R11-DR Rechargeable OTC Hearing Aids · photo 2 — Additional product photo 2

Customer reviews on Amazon

5 / 5 · 39 ratings

5 stars100%100%
4 stars0%0%
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The available aggregate ratings are uniformly five-star, which is a positive but limited signal from a relatively small rating sample. No written customer feedback is supplied, so these ratings do not show what buyers liked, whether the noise-control claims met expectations, or how the devices perform in particular settings.

Frequently asked questions

Does the Karthus R11-DR connect to a phone?

The listing says it has no app, Bluetooth or wireless function, so phone connectivity is not specified.

How long does the battery last?

The manufacturer claims up to 30 hours on one charge and up to 100 hours with the charging case. Operating conditions are not provided.

What comes in the package?

The listed contents are two hearing aids, a charging case and a user manual.

Does it have noise reduction?

The listing is inconsistent: the title and feature text claim noise reduction, but the noise-control detail says “None.” Confirm before relying on this capability.