Answer: USB1.1 version

Answer: "It is an asynchronous transmission standard interface formulated by the Electronic Industries Association (EIA). The electrical characteristics of the serial port: 1) The maximum distance of RS-232 serial communication is 50 feet; 2) RS232 can achieve bidirectional transmission, full Duplex communication; the 9-pin interface behind the desktop computer is the com port (serial port), which is widely used in industrial control data acquisition;"

RS485 is a serial interface standard. For long-distance transmission, differential transmission is adopted, and differential signals are transmitted, and its anti-interference ability is much stronger than that of RS232. RS-485 adopts half-duplex communication.

Answer: 24K, 44.1K, 48K, 192K

A: Dual output display refers to connecting two monitors at the same time and outputting images or sounds. It mainly solves the problem of constantly switching back and forth between different windows for complex work such as charts and debugging programs.

Answer: 1. Different output resolutions:

DP line 1.4 supports 4K, 60-240H, up to 8K, 60Hz; DP line 1.2 supports up to 4K, 60-100Hz.

2. Different bandwidth:

The maximum supported bandwidth of DP line 1.4 is 32.4gbps; the maximum supported bandwidth of DP line 1.2 is 21.6gbps.

3. Different technologies:

DP line 1.4 supports 10 bit image transmission and HDR dynamic image transmission, which can better reflect the visual effect of the real environment. Supports enabling G-SYNC and Freeync technology, which can solve the problem of tearing and breaking caused by high-frequency refresh. "

A: "Wi-Fi is a technology that allows electronic devices to connect to a wireless local area network (WLAN), usually using the 2.4G UHF or 5G SHF ISM radio frequency band.

802.11n 540Mbps 2.4G or 5G band

802.11ac 600Mbps 5G Band"

Answer: "North America FCC certification Korea KC certification Germany TUV certification EU CE certification China CCC certification"

A: A matrix switcher is a device that transmits one or more signals to one or more signal outputs. For example: HDMI matrix switcher, which can switch one or more HDMI audio and video source signals to one or more display screens.