1、[Practical] Combining a desk calculator and a writing tablet, this calculator writing pad can calculate and record what you want. 2、[Portable] With a flip design, easy to carry. You can put this calculator writing pad 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 button to clear the screen, writes smoothly, can be erased repeatedly, easy to use. Item Type: Calculator Writing Pad 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 Includes: 1 x Calculator Writing Pad 1 x Charging Cable 1 x Stylus 1 x User Manual