The device has multiple patents in one and compact for convenient examining. This device could be hanged around neck and could be used on a desktop and outdoor sunshade. It also has four kinds of application which brings the new application experience to users. It also includes a 5.7" high resolution color LCD with high brightness, contrast, wide visual and clear image. It also features two OB measurement: the EDD and GA of swine. The menu operation could be viewed in Chinese or English. The magnification has a maximum display depth of 200mm and modes of B and M. It has 100 frames permanent storage, high speed USB port and has a dual-mode TV output and could also connect to video recorder and video glasses. It adopts AC and DC to supply power or lithium batteries.