The 55U8G AU is a 55 inch 4K TV from Hisense, launched in the year 2021. It features a 10-bit IPS panel with Anti-glare/Matte finish.
It can achieve a maximum resolution of 3840 x 2160 with a refresh rate of 60 Hz and pixel density of 80 ppi.
Picture Quality
Now, the next important specification of a display that will impact your viewing experience is Color Gamut.
This TV doesn't provide a color gamut specification, so we have to take a guess. As this TV features a 55 inch screen, it won't come with a cheap panel, so here we can assume its equivalent sRGB coverage to be 90-100% or above. The color quality on this TV should be Lifelike! It is capable of producing color accurate images out of the box.
What Color Gamut means ?
Color gamut specification of a TV indicates the range of colors that it can show.
Put Simply, it determines the ability of a display to produce accurate colors. A TV with low gamut coverage will miss out on some colors (such as deep red), so the image produced will look "washed out" in colors.
Different manufacturers use different units to specify color gamut. Such as — sRGB, NTSC, DCI P3 to name a few.
But don't worry, below is a chart that will help you choosing a TV with good color accuracy.
After color gamut, the static contrast of a TV similarly impacts its picture quality.
Understanding the static contrast ratio of a TV
Static contrast ratio of a TV corresponds to its Black levels. A Display with low static contrast ratio (less than 1000:1) will not produce deep blacks. Moreover, such TVs may suffer from backlight bleeds such as below:

Clearly this will rob your viewing experience considerably, especially in a dark room.
Also, a TV with high constrast ratio enables you to see more details. So, resolution and static contrast ratio go hand in hand.
If given a choice, always prefer a FHD TV with high contrast ratio over a 4K TV with low contrast ratio.
This TV features a static contrast ratio of 8000:1., enough to achieve deep blacks. The panel comes with local dimming feature which is a plus.
HDR is also supported on this TV in form of Dolby Vision, HLG (Hybrid Log Gamma) and HDR10+.
Coming to brightness, it is can produce a peak brightness of 250 nits, powered by Direct LED (Full-Array Local Dimming) backlight.
Gaming Performance
Now if you are going to use a TV other than using it as a TV — say as a PC monitor or Gaming, you should get a TV that features the lowest input lag. For gaming however, both input lag and response time affects the performance.
Unfortunately, there is no specification for input lag on this TV. Now, as this is not a cheap TV, we can expect an input lag of less than 20ms.
What is Input lag ?
This lag is the latency at which device inputs changes the content of the TV. Though, this won't matter much if you aren't into competitive/FPS games like call of duty.
But ideally, look for a TV that comes with an input lag and response time of less than 20ms.
Dimensions and Ergonomics
The width of this TV is 48.5 inches while its height is 31.61 inches.
It is just 3.94 inches thick.
In total this TV weighs approximately 17.8 KGs including stand. Without stand, it weighs 17.3 kgs.
Coming to ergonomics — If you plan to wall mount the TV, you can make use of the VESA mount provided with this TV, which by the way has an interface size of 400 x 300 mm. The unit doesn't come with Swivel, Tilt or Pivot support.
Hardware and Audio
The internals of this TV is powered by 4-Core (2x ARM Cortex-A73 + 2x ARM Cortex-A52) CPU along with a (ARM Mali-G51) GPU.. However, we could'nt find any specification on the RAM on the TV's specsheet.
The Operating System on this TV is VIDAA U5.0.
For display connectivity, there are four HDMI 2.0 (CEC) ports and one AV Composite In (Video + L/R) port on this TV.
To connect USB devices, it includes — 1x USB 2.0 and 1x USB 3.0. Other connectivity ports include — 1x Cable/Antenna In (F-type female) and 1x Ethernet RJ45.
For connecting to this TV wirelessly, the manufacturer has provided a 5Ghz Wi-Fi, 2.5 Ghz Wi-Fi, Wifi-Direct and Bluetooth.
Speaking of speakers, it is packaged with 2 x 10W built-in speakers.
As for power consumption, the TV uses 113.28 Watts on average and 0.5 Watts on standby.
For powering this unit, you'll need an 100 V - 120 V/50 Hz - 60 Hz outlet.