Main Unit:

1) The main unit uses the Android system, with a screen ≥7-inch color touch capacitive display; the main unit has ≥1.0GB of RAM; ≥8GB FLASH storage space.

2) The main unit has a built-in QR code scanner (embedded, not external), automatically scanning QR codes for identity recognition and verification, making it convenient and fast to use.

3) The main unit has ≥2 standard USB ports (not externally expanded), allowing direct insertion of a USB drive to import up to 50,000 test participant records, and also to directly export test results to a USB drive.

4) The main unit supports multiple identity recognition methods: input via touchscreen, mechanical keyboard input, contactless IC card, QR code scanning, etc., with customizable identity recognition; input of student ID has an auto-increment function; the main menu supports various data filtering methods such as individual query, group query, and classification query, making queries convenient. It can import scoring standards to provide real-time scoring of test results.

5) Can batch-select test participant information from imported USB drive data (can be freely selected and added by school name, grade, class).

6) Features operation prompt sounds and voice broadcast of results, as well as manual input of results (can be used to modify individual disputed test scores).

7) Includes statistical functions: pass rate, average value, ranking, etc. (can be freely calculated by school name, grade, class).

8) The main unit allows custom grouping management information based on customer needs, such as district/county, school name, grade, class.

9) Query results on the main unit can simultaneously display test school name, grade, class, student name, gender, test score, test date, and time on one screen, facilitating later supervision.

10) The main unit features multiple data storage and backup functions, with one-click data recovery.