Gakken Adult Science Electronic Block EX-SYSTEM EX-150 New Edition Tested and working Purchased in 2008 for 11,600 yen at the time, used only a few times and stored long-term. Accessories are mostly unused. The box shows stains and scratches as it is old. I was able to confirm it powers on by inserting batteries after a long time. Dust and dirt due to aging have been wiped clean. Accessories appear to be mostly complete. Please check the photos for details. The battery cover on the back is missing, but there are no operational issues. This is a very old item. Please consider only if you understand that it is being sold as junk, with no claims, no returns, and no support.