1. Solar Panel，no need batteries while use it as a calculator.
2. Smooth shift from calculator to numeric keypad
3. Connecting the USB dongle to the computer， you will have a stable 2.4 GHz connecting and the number pad can be used as an additional keyboard
4. 10 digits and a built-in pocket calculator
5. Compatible with Windows XP / 7 / 8 /10 as well as the MacOS from 10.3.9.
Plug and Play! Just plug the USB device into an empty USB port， Wait about 10 seconds and on all of the systems it started working， No drivers to install， No software，easy to control.
Package include:1 x pocket calculator numeric pad + 1 x USB Receiver
Please don't hesitate to contact us if you have any questions or concerns before or after your purchase. We are committed to your 100% satisfaction.
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2. Time in transit: Transit time varies with different shipping methods.
3. Item Processing Time: The processing time for a specific order varies with the product type and stock status. Mostly， processing time can be 3 to 15 working days.
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