Features: The 12 number writing pad calculator features a strength plan with solar and battery backup, ensuring ongoing in various conditions, ideal for forever of office otherwise study use. Hard wearing quiet code technology, it furnishes a quiet calculation knowledge, excellent for concentrated conditions like offices otherwise libraries. Integrated with a writing pad, it allows for quick note accepting of temporary data otherwise thoughts, reducing paper waste and providing to learners and creative specialists. Produced from permanent polystyrene, that is thin and transportable, easily suitable into a backpack for on proceed use during commutes otherwise excursions. Includes a tap clear screen and a retractile pen for easy storage and immediate, enhancing efficiency with its ergonomic and wear immune plan. Specifications: Substancemail: Polystyrene Sizemail: 26.3x15x2.6cm Characteristicsecond: Double electrical supply, quiet plan Battery: double rechargeable, 2 cell Denial. 7 battery life Technical parametersecond: Writing board function｜High accuracy calculation chip｜Large screen display Use circumstancesecond: Workplace Calculation | Student Learning Assistance | Family Financial Management Package Includes: Writing board calculator × 1 (battery not included) note: Due to the problems of lighting effects and angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.