This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Anylite. Anylite solar calculator Own work by Daniel Christensen Original text created this work entirely by myself Transferred from org en transferred to Commons by User Sreejithk using de php CommonsHelper Original uploader was Daniel Christensen at org en original upload date Daniel Christensen talk Released into