Specifications:

Brand: Subject Error Set

Memory Method: Ebbinghaus Memory Method

Memory Retention Rates: 5min (100%), 30min (50%), 12h (50%), 1day (50%), 2day (70%), 4day (70%), 7day (70%), 15day (70%)

Study Efficiency Improvement: 90%

Design: Double-sided thick notebook

Paper Quality: Eye-friendly, waterproof, anti-fouling, wear-resistant, and tear-resistant

Binding: Stitched binding to prevent pages from falling out

Size: 195mm x 260mm

Color Coding: 9 colors for 9 subjects (Chinese, Mathematics, English, Geography, History, Politics, Physics, Chemistry, Biology)