Feature: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 TabletMaterial: ABSFunction: Calculation, Writing BoardScope of Application: It Can Be Used for Drawing Design, Drawing, Note Taking, Communication, Calculation, Counting, Etc.Built in Battery: Polymer Lithium BatteryBuilt in Battery Capacity: 120mAhBuilt in Battery Model: 402020Working Temperature: -10 to 40Charging Voltage: 4.2V to 5VStandard Charging Current: 125mAStandard Charging Time: 90min.Package List:1 xCalculator Writing Tablet1 x Charging Cable1 x Stylus1 x User ManualNote:Shipped with Built in Battery