NTONPOWER 電源タップのUSB - 旅行パワーストリップwithFlatプラグインウォールは

The NTONPOWER Power Strip USB packs 3 AC outlets and 4 USB ports (1 of them USB-C) into a 0.32 kg body with a roughly 1.5 m (5 ft) cord.

On Amazon.co.jp it carries 3,120 reviews at a 94% positive rate (4.7 out of 5, captured 2026-05-19) — a strong showing for this class of product.

This article goes past the spec sheet to answer the questions that actually decide a purchase: will it work in your setup, and what are you giving up?

Overview

The short version: this is a tool for people who need to run one to three AC devices plus several USB devices from a single wall outlet. A laptop adapter, a phone, earbuds, and a tablet off one socket is the use case it fits best.

It is not designed as the hub for a desktop PC, monitor, and printer. The absence of a surge protector says so directly.

Surge protection exists to keep lightning strikes and line noise from killing your gear, and a permanent desk setup wants it. NTONPOWER leaves it out deliberately, because cruise lines commonly ban surge-protected strips onboard.

So read this as "a strip tuned for travel," not "a cheap strip with corners cut."

What Actually Sets It Apart

Power strips get chosen by outlet count, but three things differentiate this one.

1. Flat right-angle plug. The plug lies parallel to the wall instead of jutting out, so a bed frame or bookshelf can sit flush against the wall.

In hotel rooms and behind furniture, those few centimeters matter — and the cable no longer gets bent at the plug's base.

2. Wall-mountable. There are holes on the back and adhesive pads in the box, which gets the strip off your desk surface entirely.

3. Mixed AC and USB. Four USB ports, one of them USB-C, means one less charger in your bag.

These two categories do not really compete. Many readers will end up owning both and using each for what it is good at.

Compatibility Guide

Voltage. The unit is rated 125 V.

Japanese mains are 100 V, so running it there is well within spec, and the plug is the same flat two-pin type. The flip side matters more: it will not work in 240 V regions such as Europe or Australia.

"Travel strip" does not mean universal here — treat it as a 100–125 V device (Japan, North America, Taiwan).

What you can plug in. The 3 AC outlets take ordinary 125 V appliances and PC peripherals.

The 4 USB ports are aimed at phones, tablets, wireless earbuds, power banks, camera batteries, and e-readers charging at once.

Capacity. The published specs list no total amperage and no combined USB wattage.

That is not something to guess at, so if you plan to plug in a hair dryer, kettle, microwave, or heater, check the rated capacity on the product page first. As a general rule, high-draw heating appliances do not belong on a compact travel strip.

Laptop adapters (65–100 W class), phone chargers, desk lamps, and monitors are all within the spirit of the design.

USB-C expectations. There is one USB-C port, but the data says nothing about Power Delivery support or output wattage.

If charging a laptop over USB-C is your goal, confirm that spec before buying. If you cannot confirm it, assume you have four ports suitable for phones and tablets.

Physical fit. The cord is about 1.5 m.

In hotel rooms where the outlet is on the far side of the bed, or under a desk, that can fall short. If you need 3 m or more, buy a longer strip instead.

Product Info

The housing is flame-retardant ABS+PC listed at 1382°F. That figure is a flammability-test rating, not an operating temperature — it means the plastic resists spreading a fire, which is exactly what you want from a power strip.

Five protections are claimed: overcurrent, overcharge, short circuit, overheat, and overvoltage.

The listed price was ￥7,138 as captured on 2026-05-19. Power strip prices move constantly with sales and stock, and this article will not update itself, so check the current price on the product page before buying. For context, ￥7,138 sits on the higher side for a 3 AC + 4 USB compact strip; comparable port counts exist for less.

At this price the deciding question is whether the flat plug and wall-mount form factor are worth the premium to you. Note also that the price label reads "Amazon US" while the link points to Amazon.co.jp — most likely a labeling quirk, but verify the currency and figure yourself.

The box contains the strip and adhesive pads. Warranty follows manufacturer policy.

How It Actually Reviews

3,120 reviews at 94% positive (4.7 of 5, captured 2026-05-19).

At that volume you are looking at a product that has sold steadily for a while, and 4.7 is high for this category.

Read the number honestly, though: 94% positive also means roughly 6% of buyers rated it poorly. For power strips, the usual complaints are a dead outlet out of the box, slow USB charging, and adhesive that lets go.

Whatever you pay, test every AC outlet and every USB port once when it arrives. Discovering a dead port after the return window closes is the worst outcome.

Best Use Cases

• Frequent travelers. At 0.32 kg with a flat plug, it slips into a laptop sleeve or small pouch. Hotel rooms routinely offer two outlets; if you need to run a laptop adapter, phone, earbuds, and camera at once, this solves it. The lack of surge protection is what makes it cruise-ship friendly.
• Home office workers and students who want a clear desk. Mount it on the wall or the side of the desk and cables stop crossing the work surface.
• Anyone tired of carrying a separate USB charger. Four ports including USB-C means one fewer item in the bag.
• People with furniture pushed flush against the wall. This is where the flat plug earns its keep outright.

Before You Buy

There is no surge protector. That is a design choice, not a defect, but it limits the use case.

Do not consolidate a desktop PC, NAS, external drives, or game consoles onto this strip. Keep a surge-protected strip for the permanent setup and use this one for charging and travel.

No PSE listing appears in the data. The certifications shown are FCC (US radio regulations) and RoHS (hazardous substances) — neither one certifies a power strip for routine use in Japan, where PSE under the Electrical Appliance and Material Safety Act applies.

For occasional travel use that may not matter; for permanent home use, confirm the PSE mark on the product page or on the unit itself. If you cannot confirm it, a domestically certified strip is the safer buy.

It will not work at 240 V. Do not let the word "travel" send this to Europe or Australia with you.

Combined USB output is not published. Multi-port chargers generally reduce per-port output when several ports are in use, so do not assume four devices will all fast-charge.

Power-hungry devices are better served by their own adapter in an AC outlet.

Do not over-trust the adhesive mount. Adhesive pads struggle on textured wallpaper, sand-finish walls, and painted surfaces, and when they fail they sometimes take the wallpaper with them — plus the plug and cable add hanging weight.

In a rental, use the rear holes with screws, or stick it to a desk leg or side panel where a failure costs nothing. Clean oil and dust off the surface first either way.

1.5 m can be short. For stationary use, measure the distance from your outlet to the intended spot before ordering.

Verify the listing yourself. Amazon product pages sometimes carry manufacturer, model, or accessory details that do not match the physical product.

This article covers the NTONPOWER strip under ASIN B07G21DRHV; before adding it to your cart, confirm from the product images and title that you are getting the 3 AC + 4 USB flat-plug version. The same brand often lists several port-count variants side by side.

FAQ

Q. Will it work on Japan's 100 V outlets? A.

Yes — 125 V rated means 100 V is within spec, and the plug shape matches. For permanent use in Japan, check for a PSE mark first.

Q. Can I take it abroad? A.

Fine in 100–125 V regions (Japan, North America, Taiwan). Not usable in 240 V regions such as Europe or Australia.

Q. Is it allowed on cruise ships? A.

It ships without surge protection, which is what cruise lines typically prohibit. Policies vary by operator, so check your cruise line's rules before boarding.

Q. Can it charge a laptop over USB-C? A.

There is one USB-C port, but PD support and output wattage are not in the published data. Confirm the output spec before relying on it; otherwise use the laptop's own adapter in an AC outlet.

Q. Can I run my desktop PC setup from it? A.

Not recommended — no surge protection, and the design targets travel. Use a proper stationary surge-protected strip for that.

Q. Are screws included for wall mounting? A.

Adhesive pads are included. The rear holes allow screw mounting, but assume you will supply the screws.

Product Disclosure (Amazon)

• Manufacturer: NTONPOWER
• Seller: fuji.harmotech
• Fulfilled by: fuji.harmotech
• ASIN: B07G21DRHV
• Note: This article covers a manufacturer-made product based on Amazon listing details.