ASUS 90LM0490-B011B0 VT229H 21.5" FHD 60Hz IPS 10-point touch portable monitor
- Touchscreen Monitor
- Capacitive 10-point…
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A 23.8-inch 2.5K portable IPS monitor with 180Hz refresh rate, height-adjustable stand, protective case, and USB-C, HDMI plus USB-A connectivity
The Laptomo 23.8-inch portable monitor delivers a 2560 x 1440 resolution on an IPS panel with 178-degree viewing angles. It is built for professionals and gamers who need a high-refresh secondary screen that travels with a protective case and integrated handle. The 16:9 display supports 90-degree rotation for portrait or landscape workflows.
A 180Hz refresh rate and 3ms response time keep motion smooth during extended gaming or video editing sessions. The height-adjustable stand maintains a stable viewing position without wobble, while the manufacturer notes the multi-window layout cuts page switching by over 50 percent. Brightness stays at 300 cd/m2 with a 2000:1 contrast ratio for consistent output.
Video and power arrive through USB-C or Mini HDMI, and a rear USB-A port passes through peripherals such as mice or drives. The monitor works with Windows, Mac, Android and Chrome OS, but devices must supply sufficient power or video bandwidth over their USB-C port. No internal battery is included, so a host connection or external supply is always required.
Measured against everything we stock in Portable & Touchscreen Monitors, at today’s prices. Recalculated every night.
| Product | |
|---|---|
| Brand name | Laptomo |
| Case color | Black |
| Monitor category | Portable Monitor |
| Display | |
| Screen size | 23.8 in (60.5 cm) |
| Display resolution | 2560 × 1440 (2K) |
| Refresh frequency | 180 Hz |
| Panel type | IPS |
| Pixel response time | 3 ms |
| Image brightness | 300 cd/m2 |
| Contrast | 2000:1 |
| Display format | LCD |
| Highest resolution | 2560 × 1440 |
| Viewing angles | 178 degrees |
| Colors displayed | 16.7 Million |
| Horizontal scan rate | 180 Hz |
| Widescreen format | Yes |
| Screen ratio | 16:9 |
| Touch interface | IPS |
| Audio & video | |
| Integrated speakers | Yes |
| Ports & slots | |
| Video connectors | 1 x Mini HDMI |
| HDMI ports | Yes |
| USB 2.0 ports | Yes |
| USB 3.0 ports | Yes |
The monitor operates via USB-C or HDMI with an external power supply, so sustained power draw depends on the source you connect rather than an internal battery.
You need a USB-C cable that carries video and power, a Mini HDMI to HDMI cable for HDMI sources, and standard USB-A cables for any peripherals you want to attach to the built-in hub.
HDMI 1.4 can output 2560×1440 but is limited to lower refresh rates, so you would not reach the full 180Hz on that connection.
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