# LG UltraFine 27US550-B 27in 4K IPS Monitor

Source: https://www.ranked10.co.uk/tech/best-4k-monitors/lg-ultrafine-27us550-b
Ranked #7 in "Best 4K Monitor 2026: Nine Ranked, and Two Listings That Contradict Themselves": https://www.ranked10.co.uk/tech/best-4k-monitors

- Price: £205.99 (checked on Amazon UK on 2026-09-17)
- Amazon rating: 4.5 from 71 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B0DK3SR7HH?tag=ranked10-21

The LG UltraFine 27US550-B is a 27-inch 4K IPS monitor listed at £205.99, and it takes seventh place in this guide. That price sits above the £161.46 listing at the bottom of the guide and below the £248.99 Philips Evnia. Its headline numbers are also the least excitable here: 60Hz and 5 ms, in a category where the surrounding boxes shout 160Hz.

Its own listing disagrees with itself in two places. The colour-gamut bullet promises DCI-P3 90% (Typ.) and the Colour Gamut Value row agrees at 90.0, but the Picture Quality Enhancement Technology row on the same page says DCI-P3 98% (Typ.). The port rows split too: Total HDMI Port counts 1, Total Video Out Ports counts 2. The rating breakdown adds a third awkward number — 77 in the five-star column against a stated 71 ratings, which only works if the bars are percentages. Everything below comes from the Amazon listing as it stands, not from a monitor we tested ourselves.

## Specification

| Field | Value |
|---|---|
| Price | £205.99 |
| Rating | 4.5 out of 5 from 71 ratings, with 77 in the five-star column of the breakdown (as listed) |
| Resolution | 3840 x 2160 (4K Ultra HD) |
| Refresh Rate | 60 Hz |
| Response Time | 5 ms |
| Colour Gamut | DCI-P3 90% in the bullet, 98% (Typ.) in the picture-quality row, 90.0 in the gamut row (as listed) |
| Contrast Ratio | 1000:1 |
| HDMI Ports | 1 in the HDMI row, 2 in the video-out row (as listed) |

## Questions people ask

**What is the LG UltraFine 27US550-B?**

It is a 27-inch IPS monitor at 3840 x 2160, described as 4K Ultra HD, listed at £205.99.

**What refresh rate and response time does it have?**

The LG UltraFine 27US550-B is listed at 60 Hz with a 5 ms response time, repeated in both the spec table and the Advanced Display Technology bullet.

**How many HDMI ports does the 27US550-B have?**

The listing gives two different answers: the Total HDMI Port row says 1 and the Total Video Out Ports row says 2.

**What colour coverage should I expect?**

The LG UltraFine 27US550-B bullet says DCI-P3 90% (Typ.) and its Colour Gamut Value row says 90.0, while the Picture Quality Enhancement Technology row says DCI-P3 98% (Typ.).

**Is the stand adjustable?**

Yes — the LG UltraFine 27US550-B listing describes tilt, height, swivel and pivot adjustment.

**How is the LG UltraFine 27US550-B rated?**

It sits at 4.5 out of 5 from 71 ratings, with 77 shown in the five-star column of the breakdown as listed.