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Although modern electronics wireless technology has been put into use, most products still need to use a USB connection.Mouse, charger cable of mobile phone , U disk, and other portable WiFi,their two sides look similar .There is no insertion guide which is easy to be perceived ,when inserting interface (especially at night), it's not easy find the right direction.
"Always right" add a small bump with fluorescent material to one side of USB ,It increases people's feelings about the USB interface from the tactile and visual aspects.During the day people can find the right insertion direction through contacting with fingers.
Xinyi He ,