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 running memory; ≥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 is equipped with ≥2 standard USB ports (not externally expanded), allowing direct insertion of a USB drive to import 50,000 test participant records, and also enabling direct export of 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; student ID input 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, class).

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

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

8) The main unit supports custom group management information based on customer requirements, 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 results, 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.