usage: The instrument is compatible with registered diagnostic EIA kit, primarily used in hospitals or some detection related to clinical immunology. Feature: 1. Provided with power on self-checking. Error data will display on LCD monitor if something wrong with the photoelectric system. 2. Filter choosing-mode: automatically. 3. Checking mode: single wave/ dual wave detection; single aperture / dual aperture detection. 4. Saving function can save the checking results of 100 pieces of plates to be called in later usage. 5. It has good characters such as high sensitivity, high accuracy, high speed of detection and the easiness of operation etc. 6. Parameters can be checked on the display without using difficult command sequences. 7. Its measurement system is 8-channel optical system . 8.It has 4 filters standard ( 405nm, 450nm, 492nm , 630nm) . 9.It can touch the screen to operate the equipment .