Brand
KYYReference Price
Check current regional price
Pricing varies by region; check the official product page for current availability.
Desk Setup Details
Product type
Fold-out dual external monitor attachment for laptops
Core function
Adds two hinged 15.6-inch screens to a laptop for a three-display setup
Compatibility
For Windows laptops with USB-C video output (DisplayPort Alt Mode or Thunderbolt 3/4); no HDMI input or Mac support
Connectivity
Two external panels can receive video through one supported USB-C connection; TechRadar reports a second USB-C power port
Key Facts
Power
No internal battery listed; powered through laptop USB-C or a reported 15 W adapter
Displays
Two 15.6-inch 1920 × 1080 IPS panels; maker lists 300 nits, 85% NTSC and 1200:1 contrast
Review sample measurements
TechRadar measured about 2.2 kg, 312.7 nits maximum brightness, 61% NTSC and 900:1 contrast on its X90E sample
Adjustability
Panels rotate 0–210 degrees; stand adjusts up to 90 degrees according to KYY
Controls
Separate on-screen menus for each display; TechRadar found the controls limited
Ownership
KYY's policies describe worldwide shipping subject to stock and authorized returns within 30 days after delivery; the posted terms do not specify warranty length or repair destination
Product Overview
KYY X90E joins two 15.6-inch panels in one fold-out laptop attachment. With the laptop display, it makes a three-screen work layout and offers several hinge positions; the independent review found it useful on a fixed or semi-mobile desk but heavy at 2.2 kg. Check the laptop's USB-C video support and the Windows-only caveat before considering it.
What Stands Out
Two hinged screens travel as one assembly and can be arranged in different side-by-side or presentation layouts. A compatible USB-C video connection can feed both panels from one laptop port.
Why It Matters
It offers a joined alternative to two separate portable monitors and stands, but the convenience comes with more carry weight and strict laptop-port requirements.
Best For
Windows laptop users with verified USB-C video output who want two extra screens for a semi-mobile desk.
Not For
Mac users, laptops without USB-C video output, anyone needing HDMI input or color-critical display work, or travelers prioritizing a light bag.
Things to Know
Confirm the exact X90E; KYY also sells X90A, X90D and X90G, which are different models.
KYY says the product is for Windows and requires USB-C video output. TechRadar specifies DisplayPort Alt Mode/Thunderbolt 3 or 4 and reports no Mac support. There is no HDMI input.
TechRadar measured its review sample at about 2.2 kg and found uneven corner brightness. It measured about 61% NTSC and 900:1 contrast, below the maker's listed 85% NTSC and 1200:1; treat those as test-sample results, not a guarantee for every unit.
The official store showed US$309.99 and an Add to cart control on October 12, 2026. Price and stock may change by region; confirm the current total and destination before ordering.
KYY's public return policy describes an authorized return window subject to conditions. A product warranty length and repair destination were not verified.
Sources
KYY X90E official product page
kyymonitor.com
Covers
Exact SKU, panel specifications, laptop compatibility, adjustable panels and the page's listed price and purchase option on October 12, 2026.
KYY About Us
kyymonitor.com
Covers
KYY describes its portable-monitor focus and says the brand began in 2015; the page does not name a manufacturing company.
KYY Contact
kyymonitor.com
Covers
Lists support email and a Hong Kong storefront contact; it does not identify where the monitor is manufactured.
KYY Shipping Policy
kyymonitor.com
Covers
International delivery estimates, stock terms and destination-specific shipping details.
KYY Refund Policy
kyymonitor.com
Covers
Authorized return window and conditions; the policy does not state a warranty period.
TechRadar KYY X90E hands-on review
techradar.com
Covers
Model-matched hands-on, system compatibility, carry weight, display measurements and limitations; includes affiliate disclosure.
Notebookcheck X90E launch coverage
notebookcheck.net
Covers
Covers the X90E launch, dual-panel design and adjustable stand.