One Beat OB3W3CS Cube Outlet Extender with 3 USB Ports

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Product guide

One Beat OB3W3CS Cube Outlet Extender with 3 USB Ports

One Beat OB3W3CS is a compact, cube-shaped wall outlet extender with three AC outlets and three USB charging ports, including one USB-C. It offers extra plug positions without an extension cord or surge protection, a trade-off to weigh for travel and cruise-cabin use.

At a glance

Three AC outlets are described as arranged on three sides to reduce plug blocking.
Three USB ports include one USB-C port, for charging devices directly without using an AC outlet.
No surge protection and no extension cord, which the listing presents as suitable for cruise travel.
Compact cube format is intended for packing and use in travel, dorm, home, or office.

Price

$8.99Save 25%

Reference price: ~~$11.99~~

Price checked: Nov 12, 2026

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Pros and cons

Pros

Combines three AC outlets with three USB charging ports in a single wall plug.
USB-C is included alongside USB ports for a broader mix of charging cables.
Three-sided outlet placement may help keep adjacent sockets accessible.
Compact cube design is easy to pack compared with a corded power strip.

Cons

It does not provide surge protection, so it is not a substitute for a surge-protected power strip where that protection is needed.
It plugs directly into the wall and has no extension cord, limiting placement to the outlet location.

Technical specifications

19 specifications

Identity
Brand	One Beat
Model	OB3W3CS
Color	White
USB ports	3
Form factor	Cube

Electrical and charging
Voltage	125 volts
Maximum current	3 A
Electrical rating	Electrical Rating:125V, 60 Hz 15A, 1875W Max
USB output	USB Output: 5V DC 3.1A TOTAL
USB-C output	USB-C ports Output: Up to 5V/3A Max, the charging speed is 30% faster.
USB port output claim	3 USB ports can detect charged devices and deliver optimum fast charging speed up to 5V/2.4A Max.
Plug type	Type B - 3 pin (North American)
Surge protection	No Surge Protection

Dimensions and installation
Dimensions listed	2.6"L x 1.8"W
Alternative size claim	Size:2.62.41.8 Inch.
Weight listed	0.11 kg
Enclosure material	Polycarbonate

Other claims
Certification claim	ETL Certified
Warranty description	1 Year Product Warranty

What to know before buying

Listing details to confirm

The listing gives conflicting size and charging details: the dimensions field says 2.6"L x 1.8"W, while another size claim says 2.6*2.4*1.8 Inch. It describes a 3A maximum, 5V 3.1A total USB output, USB-C up to 5V/3A, and up to 5V/2.4A per USB port without clearly reconciling shared output. Confirm the exact measurements and how port outputs are allocated before purchase. The listed model is OB3W3CS, while the manufacturer part number is OB3W3C. Cruise acceptance is a manufacturer claim, so check the applicable ship rules.

Who is it for?

A good fit for

Travelers and cruise passengers wanting a small, cord-free way to add AC outlets and USB charging at a wall socket.
Dorm, home, or office users who need three additional AC plug positions and three device-charging ports.

Less suited to

Anyone who requires surge protection for connected equipment.
Users who need an extension cord to position outlets away from the wall socket.
Buyers who need confirmed per-port charging output or exact physical dimensions without checking the listing details.

One Beat OB3W3CS Cube Outlet Extender with 3 USB Ports · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.8 / 5 · 3,355 ratings

5 stars86%86%
4 stars11%11%
3 stars2%2%
2 stars0%0%
1 star1%1%

Customer feedback describes the extender as useful in cruise cabins and easy to pack, with positive mentions of its outlet count and device compatibility. Charging experiences are mixed: some customers report good charging, while others report USB ports stopping work after a few days. That concern matters if USB charging is essential, since the listing's output claims do not establish reliability or clarify the available shared output across ports.

Positive themes

Customers praise its compact size and portability for travel and cruise cabins.
Feedback highlights the usefulness of the multiple outlets and compatibility with different devices.

Negative themes

Some customers report USB ports stopping work after a few days.

Mixed feedback

Charging performance receives mixed feedback, with some reporting satisfactory charging and others describing USB-port problems.

Frequently asked questions

Does this outlet extender provide surge protection?

No. The listing explicitly describes it as having no surge protection.

How many outlets and USB ports does it have?

The listing specifies three AC outlets and three USB ports, including one USB-C. It describes the AC outlets as arranged on three sides.

Can I rely on the listed dimensions and USB output?

The page gives two different size descriptions and several USB output claims that are not fully reconciled. Check the selected listing for the exact dimensions and shared charging limits.

Is it approved for every cruise ship?

The manufacturer describes it as cruise-approved, but ship policies can differ. Check the applicable cruise line's rules before packing it.