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TY-TX800 이라고 합니다.

알리인스프레스에서 현재 50달러입니다.

Calculator Scientific Graphic Calculator Multi-Functional Large LCD Screen Adjustable Contrast/Brightness USB Interface

Features:
Scientific graphic calculator, large screen, 128x64 resolution, 10+2(Mantissa + Index) display, clear show you equations, table and chart, easy access to advanced functions.
Built-in 12 function modes, calculate/complex/statistics/base-N/equation/table/matrix/vector/graph/program/sequence/link, more intelligent and improve work efficiency.
It comes with a sliding protective cover, which can be padded on the back of the calculator to prevent slipping, and can be covered to prevent dust when not using the calculator.
With USB interface, it is used to connect the computer and calculator. It can upgrade the software of the calculator and control the data of the computer simulator through the calculator.
Powered by 4 * AAA battery(not included), which can be replaced without tool, very convenient. Power saving design, 5 minutes without operation, automatic shutdown.
Made of high quality plastic, light and durable. Great for Mathematics education, science and engineering, finance, business, etc.

Specifications:
Color: Dark Blue
Material: Plastic
Screen Size: 64 * 38mm
Resolution: 128 * 64
Battery: Powered by 4 * AAA Battery(Not included)
Battery Life: About 1 Year(Average 1 hour per day)
Consumption: 0.01W
Calculator Size: 17.8 * 8.5 * 1.8cm/ 7.0 * 3.3 * 0.7in
Calculator Weight: 132g/ 4.7oz
Package Size: 19 * 13.3 * 5cm/ 7.5 * 5.2 * 2.0in
Package Weight: 368g/ 13.0oz

Packing List:
1 * Calculator
1 * User's Manual