
Scientific research has found that the distance between a sofa and a TV depends on the size of the TV. If you watch TV at an unscientific distance for a long time, it will have a big impact on the development of your child's vision. In general, there are the following situations:
The best distance between the 32-inch TV and the sofa: 2 meters; the best distance between the 37-inch TV and the sofa: 2.5 meters;
The best distance between the 40-inch TV and the sofa: 2.8 meters; the best distance between the 42-inch TV and the sofa: 3 meters;

The best distance between the 46-inch TV and the sofa: 3.5 meters; the best distance between the 48-inch TV and the sofa: 3.8 meters;
The best distance between a 50-inch TV and a sofa: 4 meters; the best distance between a 52-inch TV and a sofa: 4.2 meters;
The best distance between the 55-inch TV and the sofa: 4.5 meters; the best distance between the 60-inch TV and the sofa: 4.7 meters;
The best distance between a 70-inch TV and a sofa: 5.4 meters
If it is a flat-screen TV, pay attention:
The conventional installation height of flat-panel TVs is <15 degrees between the normal vertical line of the display and the line of sight. The height of the installation should be suitable for the user to sit on a stool or a sofa and gaze at the TV center (or slightly below). The center point of the general TV is about 1.3m above the ground. Such a viewing distance and angle are most suitable for a user to watch TV on a sofa. If the user usually likes to watch TV on the couch, the TV viewing distance and angle must be adjusted according to the actual situation.

Recommended height for flat-panel TVs
Like a 42-inch flat-panel TV, the height is about 60cm, the best height when installing is 130cm-30cm=100cm, 30cm is the center point of the flat-panel TV, so the 100cm is the height of the flat-panel TV below the ground. . At this time, users watch on the sofa, and the height of the television is just right.
The installation location is undoubtedly also a problem that the user just bought back to the TV, but often ignores the scientific method to solve. The correct installation position not only allows the user to watch comfort, but also does not harm the user's eyesight.
KYNAR HEAT SHRINKABLE TUBE/PVDF Heat Shrinkable Tube
Product description:
KY-175℃ KYNAR Heat Shrinkable Tube / Bicycle brake wireis protected Heat Shrinkable sleeving made of irradiation cross-linked special fluorine polymer PVDF ( polyvinylidene fluoride ). PVDF Heat-Shrinkable tube with the specialty of superior chemical and physical properties, high temperature resistance, high flame resistance, chemical solvent resistance, rub resistance, and so on.
KY-175 ℃ KYNAR Heat-shrinkable tubing for automobile stay wire /Friction-resistant heat-shrinkable tube it`s used in Automobile, Car,Electronics, Military, Medical equipment and other fields and allies to industries: automobile, motorcycle cables,bicycle brake cables for insulation protection. Scalpel,coagulator knife, electric coagulation knife and other metal medical equipment for insulation protection.
Feature & benefit:
a) Semi-hard materials, thin wall design
b) Resistant to 175 degrees Celsius
c) Shrink ratio: 2/1, 3/1
d) High flame resistance VW-1
e) Transparent design, inner player is visual when operating
Operating Indexes:
a) Min. Shrink temp.: 155 degrees Celsius
b) Recovered Shrink temp.: 175 degrees Celsius
c) Working temperature: -55~175 degrees Celsius
Up to standard: Approvals
Meet AMS-DTL-23053/18 , Class 2
Meet UL224 150 degrees Celsius 600V VW-1
High Temperature Heat-Shrinkable Tube
Friction resistant heat shrinkable tube,KYNAR HEAT SHRINKABLE TUBE,PVDF Heat Shrinkable Tube,The brake line protects the heat-shrinkable tube
KEYUACE Materials Co., Ltd. , https://www.insulationtubing.com