Connection with the development should be small (because a lot of smaller and lighter products in the face of development, for the spacing and appearance of size, height has certain requirements, which requires the connector products will be more sophisticated, such as wire-to-board a good choice for most small connector pitch 0.6mm and 0.8mm), high-density, high-speed, high-frequency direction. Miniaturization refers connector center spacing smaller, high density is to achieve a large number of cores. High density PCB total number of valid contacts (printed circuit board) connectors up to 600 cores, special devices up to 5000 cores. High-speed transmission refers to the modern computer, information technology and network technology requirements for signal transmission rate of up to timing MHz band, to achieve sub-millisecond pulse duration, thus requiring high-speed transmission connector. Is to adapt to the high-frequency millimeter wave technology, RF coaxial connectors have entered the work millimeter wave band.