Changchun New Industries Optoelectronics Tech. Co., Ltd. launched a series of small size classroom teaching experimental instruments. This series of instruments with features of convenient to move, easy operating, teachers can bring it to the classroom for demonstration and operation. Through the demonstration of the instruments, can make the knowledge and phenomenon in books alive, let the students understand more intuitively. It can improve the classroom teaching more plentiful and interesting. This series of instruments can be customized based on customer demand.