Main Unit Section:

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 and ≥8GB of FLASH storage space.

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

3) The main unit is equipped with ≥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 export test results directly to a USB drive.

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

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

6) Features operational prompt sounds and voice broadcast of results, along with the ability to manually input results (useful for modifying the scores of individual disputed test participants).

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

8) The main unit supports custom group management information based on customer requirements, such as district/county, school name, grade, and 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 capability.