• Training device with approximately 300,000 exercises • Switchable calculator function and protective hard case included • Effective educational game with scoring system and switchable sound • Battery-operated (included) with automatic power-off after inactivity • 4 game modes with 5 difficulty levels for thinking and calculating • Basic calculation training (addition, subtraction, division) and symbol recognition • Number series continuation and number reminder functions • Suitable for all ages, from primary school to university levels • Dimensions with cover: 15.2 x 7.8 x 1.5 cm • Lightweight at approximately 65 g