This Multi-way extension lead has lots of practical uses in and around the home, designed for use where
you need to connect up to multi-Socket and then feed them from one plug from a
mains supply. Very durable and made out of strong materials which makes it
suitable for audio visual equipment, computer equipment, telephone equipment,
power tools and garden machinery etc. It is widely used for commercial, industrial,
hospital and residential purpose.
YIDASHUN has 6 outlet power strip with 4 usb ports, and 7 power sockets with 6 usb ports. Each has a 1.8m long extension lead
with switch that can turn off without pluck the socket. And plugs of the power outlet are EU, US, UK and universal plugs for your reference,
which is widely used in all countries.
Extension Socket,Power Extension Socket,Switched Extension Socket,Outdoor Extension Socket Shenzhen Yidashun Technology Co., Ltd. , https://www.ydsadapter.com
At present, most people should see the development of the definition and color gamut. In fact, the number of frames, the brightness dynamic range, and the gray scale resolution also play a very important role in the video quality. 
With the popularity of high-definition video, there are more and more 4K ultra-high-definition video quality programs that can be downloaded over the Internet. For the average consumer, the development speed of the video definition format has a direct impact on the quality of content that we can see through TV products, such as the resolution of TV products from HD to ultra-clear.
·Color gamut 
The international standard is the wide color gamut that covers NTSC 92%. A typical TV uses a white LED, ie, a 2-color hybrid LED. The color coverage is about NTSC 72%. The backlight of the wide color gamut TV uses a red/green/blue hybrid LED. The color is extremely bright, and the coverage rate is about 92% -110%.
The importance of the BT.2020 standard is beyond doubt. Just as BT.709 played a guiding role in the production of high-definition video transmission and high-definition display equipment, the BT.2020 standard also has a profound impact on the design of ultra-high-definition display devices in the consumer sector. And manufacturing, especially in the 4K flat-panel TV is more prominent.
· Brightness dynamic range 
Brightness dynamic range - The integration of HDR technology is not just for the television to increase the brightness range, but also has some significant changes in the color change. The BT.2020 color space has been defined by the ITU International Telecommunication Union as an image signal color gamut standard for the 4K/8K era. The vertical axis of the display (right image) is the luminance range display on the color gamut chart. We have obtained geometrical, three-dimensional color growth.
·Time resolution (frames) 
The number of frames is the amount of pictures transmitted in one second. It can also be understood that the graphics processor can refresh several times per second, usually expressed in frames per second (fps). Each frame is a still image. Displaying frames in rapid succession creates an illusion of motion. A high frame rate gives smoother, more realistic animations. The higher the number of frames (fps), the smoother the displayed action will be.
However, the file size will become larger.
Grayscale resolution 
Grayscale resolution shows the ability of the display to distinguish grayscales. The greater the grayscale resolution, the more grayscale that can be displayed on the screen. The early monitors had 16-color designs with very low grayscale resolution. Later, they were upgraded to 256 colors, and later they were upgraded to 8-bit, 16-bit, and 32-bit, and the grayscale resolution of the display was also higher. Since each color of the display is represented by the grayscale mixture of red, green, and blue channels, the capability of the display to distinguish the grayscale basically determines the ability of the display to restore true colors.
Television video quality is divided into five parts: sharpness, number of frames, color gamut, grayscale, and brightness dynamic range.
Resolution