1.7 inch touch screen keyboard 2. LCD module 3.Convenient to use 1 ... the enclosure.5. Interface adaptive: automatically adapts to identify with serial port, do not need to be automatic connection ... .7. Perfect compatibility : can connect any kinds of terminals,such as,guoguang,shida,GreatWall,mudan,huizhi,juxing,haiwei,newsun ... by dial sets of command.11. Evaluation module with three evaluation buttons