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[ETL Listed] Cable Matters 3-Pack 3 Outlet Wall Adapter (Grounded Cube Tap, Outlet Splitter, 3 Way Plug Adapter, 3-Prong Power Splitter), Gray
Cable Matters

Cable Matters 3-Pack 3 Outlet Wall Adapter

Bottom line: The Cable Matters 3-Pack 3 Outlet Wall Adapter ($6.79 on Amazon as of 2026-10-06): Turns one grounded outlet into 3 AC outlets with no power strip bulk; main trade-off: two units cannot fit side by side on the same duplex receptacle.

$6.79

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Buy on Amazon — $6.79 Compare to similar accessories

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides.

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ Turns one grounded outlet into 3 AC outlets with no power strip bulk
  • ✓ 90-degree design keeps bulky wall warts from covering the adjacent outlet
  • ✓ 3-pack covers desk, bedside, and travel bag in one purchase
  • ✓ Accepts both 3-prong grounded and 2-prong polarized cords

Cons

  • ✗ Two units cannot fit side by side on the same duplex receptacle
  • ✗ No surge protection listed, so sensitive gear still needs a protected strip
  • ✗ No USB ports; every device needs its own AC brick
  • ✗ Cube tap hangs off the wall, so heavy adapters can add strain

Manufacturer description

The Cable Matters 3 Outlet Wall Adapter turns one grounded receptacle into three AC outlets without the footprint of a power strip, and this 3-pack gives you one for the desk, one for the nightstand, and one to leave in a laptop bag. The 90-degree design is the reason it earns space behind furniture: bulky wall warts sit flush and sideways instead of jutting out and covering the receptacle next to them. Each grounded cube tap accepts both 3-prong grounded cords and 2-prong polarized cords, so a monitor brick, a phone charger, and a lamp can share a single wall plate. Keep in mind the…

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SpecPicks Verdict

SpecPicks scored Cable Matters 3-Pack 3 Outlet Wall Adapter using a rating × review-volume × price-fit model applied to published specs and reviews across the accessories category. Cable Matters's accessories lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for accessories of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

How many outlets does this adapter add?

Each adapter converts a single grounded wall outlet into 3 AC outlets, and the package includes 3 adapters for 9 outlets total across three receptacles.

Can I plug two of these into the same wall outlet?

No. Cable Matters notes that the adapter will not block the other outlet, but two of these adapters cannot fit side by side on the same wall outlet.

Does it work with 2-prong plugs?

Yes. It accepts 3-prong grounded cords and 2-prong polarized cords, so older lamps and chargers work alongside grounded electronics.

Does this include surge protection?

The product is described as an ETL Listed grounded cube tap and outlet splitter, not a surge protector. Check the product listing for current electrical ratings before connecting sensitive equipment.

Is it good for travel and hotel rooms?

Yes. The compact cube tap is designed for laptop bags, hotel rooms, and conference rooms, and the 3-pack makes it practical to leave one packed.

Key Features

  • Sturdy 3 Wall Outlet Extender: This multi plug wall outlet adapter converts a single grounded outlet into 3 additional AC electrical outlets, offering a space-saving solution without the bulk of a traditional power strip.
  • 90 Degree Outlet Adapter: The innovative 90-degree design allows large wall warts and adapters to fit without blocking adjacent outlets, making this electrical outlet extender perfect for tight spaces. Note: It won’t block the other outlet, but two of these adapters cannot fit side by side on the same wall outlet.
  • Cost-Effective 3-Pack: This set of three power outlet extenders provides extra wall plugs, making it convenient for travel or keeping in your laptop bag, ensuring reliable access to power wherever you go.
  • Space-Saving Design: The compact 3 outlet cube tap (also known as plug splitter or power outlet splitter) is ideal for use behind furniture or in tight spaces, adding additional outlets in hotel rooms, conference rooms, or areas with limited AC receptacles.
  • Versatile Compatibility: Works with 3-prong grounded cords and 2-prong polarized electrical cords, this multi plug outlet solution is perfect for sideways AC receptacles and offers a convenient way to expand power access.

Full Specifications

BrandCable Matters
ColorGray
Plug TypeType B
Unit Count3 Count
Input Voltage125 Volts (AC)
Output Voltage125 Volts (AC)
Item Dimensions2.48 x 1.65 x 1.65 inches
Mfr Part Number400011x3, LA-21
Number of Outlets3
Item dimensions L x W x H2.48 x 1.65 x 1.65 inches
Full listing title[ETL Listed] Cable Matters 3-Pack 3 Outlet Wall Adapter (Grounded Cube Tap, Outlet Splitter, 3 Way Plug Adapter, 3-Prong Power Splitter), Gray

Ready to buy?

[ETL Listed] Cable Matters 3-Pack 3 Outlet Wall Adapter (Grounded Cube Tap, Outlet Splitter, 3 Way Plug Adapter, 3-Prong Power Splitter), Gray is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $6.79

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

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[ETL Listed] Cable Matters 3-Pack 3 Outlet Wall Adapter (Grounded Cube Tap, Outlet Splitter, 3 Way Plug Adapter, 3-Prong Power Splitter), Gray
$6.79
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