3M Cube Extension Lead with USB C – 4-way plug extension with 4 USB ports (2 USB A & 2 USB C)
Product description
If your desk (or bedside table) is crowded with chargers, leads and wall-adapter “brickwork”, this cube-style extension lead is designed to tidy things up. The idea here is simple: one tower extension gives you multiple AC outlets plus four USB ports so you can power and charge a spread of devices from a single spot.
On paper, it’s the kind of setup that suits modern homes and offices where you’ve got a mix of phones, tablets and laptops, alongside the usual need for plugs for small appliances. But it isn’t magic—extension leads always come with a bit of common-sense checking around placement, load and what you plug in.
Key takeaways
This 3M Cube Extension Lead combines 4 AC outlets and 4 USB ports (including USB C) in a cube-style design intended for desktop use and for reducing the “blocked socket” problem you get with bulky plugs.
You also get an on/off switch that can manually turn all outlets and USB charging on or off together, plus a 3 metre extension length for reaching awkward spots. If you like the idea of charging several devices at once without extra chargers and adapters, it’s built for that.
It’s also reassuring that the listing mentions safety-focused elements such as a 13A fused plug and fire-retardant housing, with CE/UKCA/RoHS certifications.
What matters most (and what to check)
The standout concept is the “cube” form factor. Because the outlets are arranged so you can plug in in different directions, it should be easier to fit larger adapters without permanently sacrificing the socket next to it. For real life, that means you’re less likely to end up with one charger wedged in a way that forces another adapter to stay unplugged.
That said, it’s still an extension lead, so a couple of practical checks are worth doing before you buy. First, think about where the 3 metre cable will route in your room—under desks, behind a TV stand, or near kitchen appliances—so it doesn’t get pinched or strain at the plug point. Second, consider what you’re likely to power: this lead is described as having 4 AC outlets with a total rating listed as 3250W, so you’ll still want to avoid overloading by stacking high-demand devices.
The essentials
This model is a tower/cube extension lead designed for home, desk, office and similar “everyday” locations. Key aspects mentioned include:
- 3 metre extension cable length for flexibility
- 4 AC outlets plus 4 USB ports (2 USB A & 2 USB C)
- A top on/off switch that can control outlets and USB charging together
- Smart IC charging technology that detects connected devices and delivers the optimal charging speed (for the 5V/2.4A USB ports)
- A widened base for stability during use
- A 13A fused plug intended to shut off in case of excessive current
It’s positioned as a neat, multi-device charging solution rather than just a basic extension.
Tech specs
- Name: 3M Cube Extension Lead with USB C
- Type: Multi plug extension lead with USB charging
- Format: Tower / cube-style design
- Size: 110 x 110 x 169.5mm (tower-sized plug extension lead)
- Length: 3 metre extension cable
- Capacity: 4 AC outlets (total listed rating: 3250W)
- AC plug: 13A fused plug
- USB ports: 4 USB ports (2 USB A & 2 USB C)
- USB output: 5V / 2.4A (smart IC charging mentioned)
- Material: 100% pure copper wire (power cord)
- Temperature tolerance (listing): up to 1382°F (750°C)
- Certifications: CE, UKCA, RoHS
- Protection: Fire-retardant housing mentioned
Where it shines in daily use
A good real-world example is a home office setup. Imagine one outlet on the wall that’s slightly awkward behind a desk: with a 3 metre lead you can pull power forward, then use the AC sockets for a desk lamp and a laptop charger brick. Meanwhile, the USB ports can take care of a phone and a tablet so you’re not constantly swapping cables or hunting for wall adapters.
The cube layout is also meant to help with bulky plugs. If you’ve ever had two chunky power adapters fight for space on a conventional strip, this design is trying to remove that frustration.
It might not be for everyone
It may not be a great match if you only need one or two sockets and already have enough USB charging elsewhere—an extension lead like this is more “hub” than “quick extra”. Also, if your plan is to drive multiple high-power appliances at the same time, you’ll need to be careful about total load rather than assuming “more ports” means “more capacity”.
And while the USB ports include USB C (handy for modern devices), you still need to check that your devices charge appropriately via USB. Some devices use unusual charging requirements, and the smart IC approach is designed to optimise speed, but it can’t change what a device needs.
Is it worth it?
You should buy it if you want a single desktop-friendly extension lead that combines multiple AC outlets with both USB A and USB C charging, especially where space for bulky adapters is an issue. It’s also sensible if you need the extra reach of a 3 metre cable and prefer the convenience of a shared on/off switch for everything.
You may want to skip it if your setup is simple (few plug requirements, no need for USB charging) or if you’re likely to run several high-demand appliances at once. In that case, a more basic extension—or a different power strategy—could be a better fit.
Quick FAQ
Can it charge multiple devices at the same time?
Yes, the listing frames it as charging up to eight devices simultaneously using 4 AC outlets and 4 USB ports.
Does it have USB C?
Yes—there are 4 USB ports in total, including 2 USB C ports.
What does the switch do?
The on/off switch on the top is described as turning all outlets and USB ports on or off together.
Is it safe for everyday use?
The listing mentions a 13A fused plug (intended to shut off in excessive current) and fire-retardant housing, alongside CE, UKCA and RoHS certifications.
How long is the cable?
The extension cable is described as 3 metres long.