Features: 2 in 1 design, this calculator handwriting board calculator and writing board combination. The stylus- magnetically fixed on the side, so you can calculate and record at any-time. The calculator keyboard made of silicone, which can bring you a more comfortable touch and silent. Lightweight flip type calculator, will protect the keyboard well. And its portable size will allow you to take it with you. Type-C charging and solar-power universal, a great choice for an environmentally friendly lifestyle! 12-Digits display with 6in large handwriting screen for multi-purpose. Specifications: Writing lines color: Black/Yelow/Cyan-blue Size: folded - 9x15.3x1.1cm / 3.5x6.02x0.4inches, unfold - 18x15.3x1.1cm /7.09x6.02x0.4inches Net weight: 250g Power supply: Type-C charging & solar panels- Lifespan: 100,000times erase Note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment. Package includes: 1PC x LCD Calculator 1PC x Stylus- 1PC x TypeC Charge Cable