USB 2.0 is a USB interface standard released in 2000 with a theoretical maximum transmission speed of 480Mbps (about 60MB/s). The port has four cables (five cables for MicroUSB and MiniUSB), and the maximum output current is 0.5A. USB 2.0 is currently the most common version of USB port, almost all computers have USB 2.0 port, most USB devices also support USB 2.0. USB 2.0 hub. The device can provide USB high speed or full speed connection on the uplink port. The device also provides USB high-speed, full-speed, or low-speed connections on the downlink port. When the uplink port is connected to an electrical environment that supports only high-speed, full-speed, and low-speed connections, the high-speed, full-speed, and low-speed USB connections on the downlink port are enabled. When the uplink port is connected to an electrical environment that supports only full or low speed connections, the USB high-speed connection on the downlink port is disabled. USB 3.0 Hubs is higher than usb 2.0 in terms of transmitting data.
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UVC refers to an ultraviolet lamp with a wavelength between 200 and 280 nanometers (nm). UVC wavelength light can be used to disinfect water and surface surfaces, to eliminate harmful microorganisms in food and air, and for use in spectroscopy applications.
Yole Developpement estimates that the market for UVC lamps in 2012 will reach nearly $200 million, and such lamps are increasingly being replaced by UV LEDs.
The company's senior vice president of business development, Therese Jordan said: "Unlike UV lamps, UVC LEDs are mercury-free, small and rugged, so they are suitable for many designs and are expected to have a longer life and can be realized. Environmentally friendly disposal." 
Crystal IS, Inc., a manufacturer of proprietary high-performance ultraviolet light-emitting diode (UVC LED) for inspection, purification and disinfection applications, recently announced that it has successfully achieved a significant light output of more than 65 mW at 260 nm in a single UVC LED continuous mode of operation. Achievements, achieving record performance.
March 31, 2024