Overview
The KYY X90E is a hinged portable monitor that adds two 15.6‑inch 1080p screens to a laptop, creating a three‑screen workstation connected via a single USB‑C cable. Priced just over $300 and weighing 2.2 kg, it targets mobile professionals who need extra screen real‑estate without a bulky dock.
Design & Build
The unit features a sturdy hinge that positions one display to the left and one to the right of the laptop. The slim panels can be used in landscape or portrait mode, and the whole assembly can be folded to a single‑screen configuration for compact travel.
Connectivity
Both external screens receive video, data and power through a single USB‑C cable that supports ALT‑DP mode. An optional 15 W USB‑C power supply can power the monitors directly, or the laptop can supply power if it has sufficient wattage.
Performance
The X90E’s panels deliver decent contrast, good colour accuracy and uniformity, though luminance uniformity is not perfect. The colour gamut is limited for a portable display, making it less suitable for colour‑critical work.
Pros & Cons
- Three‑screen setup with a single cable simplifies cabling.
- Improved panel quality over previous KYY models.
- Flexible orientation – landscape, portrait, or folded single‑screen.
- Lightweight for a dual‑monitor solution.
- Requires a laptop with USB‑C/Thunderbolt ALT‑DP support; no driver needed.
- Battery drain can be significant when all three screens are active.
- Limited colour gamut may not meet professional colour‑grading needs.
Buying Considerations
Ensure you purchase the X90E variant—not the X90A or X90D—as specifications differ. The unit is available on Amazon for $239.99 (≈20 % off the $299.99 list price). Competing Chinese manufacturers offer similar sizes for under $200 (14‑inch) or multi‑screen kits up to $450.
Conclusion
The KYY X90E provides a practical, single‑cable solution for adding two extra 15.6‑inch displays to a laptop, ideal for productivity‑focused users who can tolerate higher power consumption and don’t need a wide colour gamut. At its current price point, it represents solid value for mobile professionals seeking a versatile, portable multi‑screen setup.