1, using the standard SD interface mode, through the card reader and the computer or through the programmer SD interface connection to achieve the corresponding operations such as testing or programming 2, Compatible with ball and ball test, IC limit frame is integrally molded with mold, and different size limit frames can be selected according to IC to achieve different size ICs 3, support hot plug, support for testing PIN connection with the board through the SD interface or through the cable 4.The structure adopts injection molding, accurate positioning, convenient IC access and higher work efficiency