functions in one: this is a new innovative calculator, a calculator with a writing board, which is convenient for Studing and Working. Planning boardscan better serve your office and study. This is a major innovation. Compared with traditional calculator, our product applies USB cable to power itself instead of one-time button battery. Performs common math as well as various financial functions, Perfect for both adults and students. Its small size can be carried around, convenient for you to work and study at any time.
Specification: Working temperature of the writing pad: -10? to 40?
Battery: Lithiumbattery (rechargeable)
Charging voltage: 5V
Charing time: 90 minutes
Size of writing board: 6.5 in
Battery capacity: 120mah
Writing board life: 1000, 000 times
Use time per charge: Over 6 months
Color: Pink, Black (optional)
Size: 15*9* 1.4 cm/ 5.9 * 3.54 * 0.55 in
Package size: 19*10* 1.9 cm/ 7.48 * 3.93 * 0.74 in
Net weight: 176g/ 6.2 oz
Packing list: 1*Calculator Writing Board 1*The instructions 1*USB cable