Launched in the year 2022, the 55U7H is a 55" 4K TV from Hisense. It comes with a 10-bit IPS panel.
It can display a max resolution of 3840 x 2160 with a refresh rate of 120 Hz and pixel density of 80 ppi.
Picture Quality
After screen size and resolution, the next most important specification to look for in a display is its Color Reproduction, which is defined by its color gamut specification.
This TV doesn't come with a color gamut specification, so we have to make an assumption based on its panel type.
Considering the TV features a big 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. Undoubtedly The color accuracy on this TV should be Lifelike! Meaning it will produce color accurate images by default.
Understanding Color Gamut
Color gamut spec of a display is the measurement of the range of colors that the display can display.
A display with poor color accuracy will produce undersaturated/washed out colors that will spoil the immersion.
It is specified in different units - sRGB(most popular), 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.
Next in the list of important specifications is Static Contrast.
Understanding the static contrast ratio
A TV with low static contrast ratio will not produce deep blacks and can bleed backlight as shown below:

The static contrast ratio of above TV is 800:1. So make sure you get a TV with a static contrast of >= 1000:1. More the better.
Also, static contrast ratio and resolution go hand in hand when it comes to details. To put it into perspective, a TV with low contrast ratio will show both dark gray and black as black, so lesser detail overall.
If given a choice, always prefer a FHD TV with high contrast ratio over a 4K TV with low contrast ratio.
This TV comes with a static contrast ratio of 8000:1., well enough to achieve deep blacks. The panel comes with local dimming technology which is a plus.
Dolby Vision, Dolby Vision IQ, HDR10 and HLG (Hybrid Log Gamma) are also supported on this TV, so that's a plus.
Coming to brightness, it is can achieve a maximum brightness of 250 nits, powered by Direct LED (Full-Array Local Dimming) backlight technology.
Gaming Performance
If you are going to use your TV other than using it as a TV — like as a PC monitor or Gaming, make sure to get a TV that features the lowest input lag. For gaming however, both the input lag and response time impacts the performance.
Sadly, Hisense did not specify the input lag on this unit. Now, as this is not a cheap TV, we can expect an input lag of less than 20ms.
What is Input Lag and Why it matters ?
This lag is the amount of time at which key-presses or mouse movements changes the content of your TV. Though, this won't matter much if you aren't into competitive/FPS games like call of duty.
Although for better experience, look for a TV that features an input lag and response time of less than 20ms.
Dimensions and Ergonomics
Vertically, the TV measures 55 inches and horizontally 48.54 inches. Speaking of thickness, it is 2.99 inches thick.
It weighs 14.4 Kgs and an additional 0.9 kgs if you include stand. So plan your space accordingly.
Now, speaking of ergonomics — a VESA mount with interface size of 300 x 200 mm is provided for wall-mounting. The unit doesn't come with either Swivel, Tilt or Pivot support.
Hardware and Audio
The core of Hisense 55U7H is powered by a 4-Core CPU. There is no information about the total available RAM on this TV.
The Operating System on this TV is VIDAA U6.0.
For display connectivity, there are three HDMI 2.0 (CEC) ports and one AV Composite In (Video + L/R) port on this TV.
For connecting USB devices, it includes 1x USB 2.0 and 1x USB 3.0. Other connectivity ports include — 1x Satellite In (F-type female), 1x Antenna (RF) (female), 1x CI+ 1.4 and 1x Ethernet RJ45.
For wireless connectivity on this TV, you will have — Wi-Fi (5Ghz + 2.5Ghz), Wifi-Direct and Bluetooth.
Speaking of speakers, it is packaged with 2 x 10W built-in speakers.
As for power usage, it consumes 84W on average and 0.5W on standby.
Both 110V and 220V lines are supported on this unit.