HANNA brand launched ultra-thin microcomputer acidity pH-pH-mV conversion - reoxidation reduction ORP tester, laboratory, hanging and portable three modes of use, ultra-thin lightweight appearance design, 5.5 inches large screen LCD display, touch key operation, unique data type intelligent electricity, automatic recognition, fault diagnosis; GLP management function, large capacity data storage, micro and USB dual data interface, data transmission and fast charging, to meet the needs of users for a variety of measurement projects.