This article covers HAILESI S135 13.5インチ ポータブルモニター Switch, sold in English-speaking markets as the HAILESI S135 13.5-inch portable monitor.
It has a 2256×1504 panel with a tall 3:2 aspect ratio. That shape is excellent as a laptop second screen, but Switch and console games are 16:9, so part of the screen goes unused.
Whether that trade-off suits you decides whether this monitor is a good buy.
Overview
The HAILESI S135 is a 13.5-inch portable monitor with a 2256×1504 resolution, a 3:2 aspect ratio, 100% sRGB coverage and 500 cd/m² brightness.
It has two inputs, Mini HDMI and USB-C, and HAILESI advertises single-cable USB-C connection to Nintendo Switch and Switch 2. It weighs 0.60 kg, is about 1.0 cm thick and has built-in speakers.
Our verdict: its best use is extending a laptop's workspace on the go. A 3:2 panel shows more of a document, spreadsheet or web page than a 16:9 panel of the same size.
It works for Switch as well, but games are 16:9 and will show black bars at the top and bottom. If gaming is your main use, compare it with 16:9 portable monitors first.
What 3:2 at 2256×1504 Means in Practice
At 13.5 inches, 2256×1504 works out to roughly 200 ppi.
Text is much sharper than on a typical 1080p portable panel. At 100% scaling in Windows, though, text is too small, so most people will use 150–200% scaling.
Some 13.5-inch laptops use this same resolution, so pairing the monitor with one of them gives both screens matching text sizes.
Console video is 16:9. Scaled to the full 2256-pixel width, a 16:9 image is about 1269 pixels tall, which leaves roughly 117 pixels of black bar above and below.
You may be able to stretch the image instead, but it will look distorted. Switch output also doesn't match the panel's native resolution, so expect some softness from scaling.
It is still a big step up from handheld mode, but it is not the pairing that gets the most out of this panel.
Compatibility Guide
HAILESI lists Nintendo Switch/Switch 2, laptops, Android smartphones, PS5 and Xbox Series X|S as compatible, along with other devices that output video over USB-C or HDMI. Whether a device actually works depends on the device's port:
| Source | Port | What to check |
|---|---|---|
| Laptop | USB-C | Whether that USB-C port supports video (DisplayPort Alt Mode or Thunderbolt) |
| Android phone | USB-C | Whether the phone supports USB-C video output (many don't) |
| Switch / Switch 2 | USB-C | Whether the monitor needs separate power; check recent user reports |
| PS5 / Xbox Series X|S | Mini HDMI | Video goes over HDMI and power comes in over USB-C, so you need two cables |
Not every USB-C port carries video. A port that only handles charging and data will show nothing.
On a laptop, look for a DisplayPort or Thunderbolt symbol next to the port, or check the manufacturer's spec sheet.
Watch the power budget. If a laptop or phone has to supply both the video signal and the monitor's power, it may run short when brightness or speaker volume is high.
If the screen dims, flickers or disconnects, power the monitor separately over USB-C. A power bank works, but it needs enough output.
PS5 and Xbox Series X|S cannot output video over USB-C, so connect them with Mini HDMI and power the monitor separately from a wall charger or power bank. The consoles have full-size HDMI ports, so use a full-size-to-Mini HDMI cable.
Product Info
- Display: 13.5 in / 2256×1504 / 3:2
- Color gamut: 100% sRGB
- Brightness: 500 cd/m²
- Inputs: Mini HDMI, USB-C
- Speakers: built-in
- Weight: 0.60 kg
- Dimensions: 30.30×22.50×1.0 cm
As of October 1, 2026, the price on Amazon.co.jp was ¥27,947.
Prices change often, especially during sales, so check the listing for the current price. As of September 30, 2026, the Amazon rating was 4.0 out of 5 from 55 reviews.
That is generally positive, but 55 reviews is not many, and compatibility problems or unit-to-unit variation may not show up yet. Look for reports from people using the same devices as you, especially Switch 2 or your laptop model.
The original article listed a USB-C cable, a Mini HDMI cable, a cover that doubles as a stand and a manual in the box. It also said a one-year manufacturer warranty is typical.
Both can vary by seller and production batch, so confirm on the listing. Most portable monitors at this price are 1080p and 16:9.
This one stands out with its high-resolution 3:2 panel and 500 cd/m² brightness.
Size and Portability
At 30.30×22.50 cm, the monitor is slightly larger than A4 paper (29.7×21.0 cm).
It may not fit a bag pocket that is only labeled "A4"; a sleeve for a 13–14-inch laptop is the safer choice. At 0.60 kg, carrying it is like carrying part of a second laptop.
Together with a laptop you will often carry around 2 kg, so think about whether you will bring it every day or only on trips.
Recommended Users
- Remote workers and business travelers with laptops: The tall 3:2 screen fits documents and chat side by side and greatly expands your workspace. If your laptop also has a 13.5-inch 3:2 screen, the two displays will look consistent.
- People checking photos or designs on the go: 100% sRGB and 500 cd/m² are enough for checking web-bound color. For print-accurate work, choose a monitor that supports hardware calibration.
- Switch / Switch 2 players who want a bigger screen without carrying the dock: A good fit if letterboxing doesn't bother you and you mainly play while traveling.
Before You Buy
Who should skip it: gamers who want the image to fill the screen. 16:9 content always shows black bars here, so a 16:9 portable monitor at a similar price uses its panel more fully.
The spec data we have does not list a refresh rate, and the original article said this monitor isn't for people who need high refresh rates or 4K. If you play competitive games and want very smooth motion, a desktop gaming monitor is the better choice.
There is also no DisplayPort input.
"One USB-C cable" works only if two conditions are met: the source's USB-C port must output video, and there must be enough power. When a phone won't display anything, the cause is usually that the phone doesn't support video output.
Switch 2 behavior can vary by setup, so check recent user reports before buying.
Plan your power supply. 500 cd/m² helps outdoors and in bright rooms, but running at full brightness uses more power.
Powering the monitor from a laptop also drains the laptop's battery faster. For long sessions, a dedicated USB-C charger for the monitor gives the most stable results.
Treat the speakers as basic. Speakers that fit in a thin body have limited bass and volume.
For games and video, plan on using earphones or headphones.
Check the listing details. The Amazon Japan listing names "Amazon US" as the seller and shipper.
The seller and shipping terms you see can change depending on the offer, so check the seller, shipping and return terms before ordering.
FAQ
Q. Do I need the Switch dock? A.
HAILESI says the monitor connects directly over a single USB-C cable. Results can depend on how the monitor is powered, so check recent user reports for Switch 2 before buying.
Q. Does it work with PS5? A.
Yes. Connect with Mini HDMI and power the monitor separately over USB-C.
PS5 video is 16:9, so expect black bars at the top and bottom.
Q. Can I use it with a smartphone? A.
Android phones are on the compatibility list. Phones that output video over USB-C may work, but many phones don't support video output, so check your model.
Q. Text in Windows is tiny. What should I do? A.
This is expected at 2256×1504 on a 13.5-inch screen.
Set display scaling to 150–200% in Windows settings.
Q. Is it a touchscreen?
A. Touch support isn't listed in the spec data we have. If you need touch, check the listing.
Product Disclosure (Amazon)
- Manufacturer: HAILESI
- Seller: Amazon US
- Fulfilled by: Amazon US
- ASIN: B0GVS52LCL
- Note: This article covers a manufacturer-made product based on Amazon listing details.
