Features: 1.[Practical] Combines a desk calculator and a writing pad, this calculator writing tablet can calculate and record what you want. 2.[Portable] With a flip design, easy to carry. You can put this calculator writing tablet in a bag, pocket, or wallet. 3.[Rechargeable] Equipped with a charging cable, this calculator writing board is a perfect choice for office, business and home use. 4.[Low Power Consumption] The calculator writing board has low power consumption, no radiation, energy saving and environmental protection. 5.[Easy to Use] There is a key to clear the screen, writing smoothly, can be repeatedly erased, easy to use. specification:Item Type: Calculator Writing Tablet Material: ABS Function: Calculation, Writing Board Scope of Application: It Can Be Used for Drawing Design, Drawing, Note Taking, Communication, Calculation, Counting, Etc. Built in Battery: Polymer Lithium Battery Built in Battery Capacity: 120mAh Built in Battery Model: 402020 Working Temperature: -10 to 40 Charging Voltage: 4.2V to 5V Standard Charging Current: 125mA Standard Charging Time: 90min PackageList:1 x Calculator Writing Tablet 1 x Charging Cable 1 x Stylus 1 x User Manual NoteShipped with Built in Battery