This is the English edition of a review from my Japanese YouTube channel, iestaLife. I review gadgets from my home studio in Japan, so product links go to Amazon Japan.
Quick take
KEEPTIME’s 15.6-inch portable monitor now comes in a wireless version with a built-in battery and kickstand. Compared with the wired model I already use, it is heavier and more than twice the price, but not having to run a cable makes it far easier to set up on a dining table or move around the house.
What I tested
- KEEPTIME wireless portable monitor, 15.6 inch (an Amazon Japan exclusive model)
- KEEPTIME wired portable monitor, 15.6 inch, for comparison
- A Mac (screen mirroring, extended display), an iPhone, and a Windows 11 desktop
What I found
- The kickstand is built in and feels sturdy. Lift it to reach the ports; with it closed you can’t plug in a cable.
- It powers on instantly, rotates automatically with a gravity sensor, and has speakers that are fine for casual video.
- On the Mac, you pick it from Screen Mirroring and enter the code shown on the monitor. It worked as an extended display without problems.
- The iPhone connects the same way and rotates between portrait and landscape. In my test, streaming apps such as Netflix played audio but no picture.
- Windows 11 connected straight away — cursor tracking actually felt better than on the Mac.
- Over wireless from the Mac, cursor tracking felt slightly behind a cable connection. For a chat window or reference material it was fine.
- Side by side at full brightness, brightness looked similar but the colours differed clearly; to my eye the wireless model was closer to the Mac’s own screen.
- Battery life is quoted at around three hours, likely less at maximum brightness. It only got slightly warm.
Wireless vs wired
| Wireless model | Wired model | |
|---|---|---|
| Screen | 15.6 inch | 15.6 inch |
| Price on Amazon Japan (at the time of recording) | Just under ¥20,000 | About ¥8,000 |
| Weight (my measurement) | 777 g | 576 g |
| Stand | Built-in kickstand | Uses the included cover |
| Battery | Built in (about 3 hours) | None |
| Cables for HDMI | 1 | 2 (needs USB-C for power) |
Who it’s for
People who work at a dining table or move their workspace often, and anyone who wants to connect an HDMI device with a single cable. If the monitor will sit permanently on your desk, the cheaper, lighter wired model is enough. If you plan to use a work laptop, check first: reportedly, strict corporate security settings can block wireless display (I haven’t tested this).
Watch the review
The video is in Japanese. Mac wireless connection starts around 03:45, weighing around 06:25, and the side-by-side colour check around 08:15.
Limitations
I didn’t measure battery life or latency with instruments; those comments are from hands-on use. Colour impressions are from one unit of each model. Prices were Amazon Japan’s at the time of recording.
Products
KEEPTIME wireless portable monitor, 15.6 inch (Amazon Japan exclusive): on Amazon Japan
KEEPTIME portable monitor, 15.6 inch (wired): on Amazon Japan
The Amazon Japan links above are affiliate links. As an Amazon Associate, I earn from qualifying purchases. Check the listing for the exact model, current price and shipping availability in your region.
More reviews in English
All Camera & Desk Setup (42) →Browse all English reviews →
This review is also available in Japanese.