Gakken EX-150 electronic block set for learning electronic circuits. - Brand: Gakken - Model Name: EX-150 - Included: Instruction manual, wiring, all parts - Type: Electronic block - Features: Includes circuit diagrams, resistors, capacitors, transistors, and other components Everything shown is included. It appears to be complete, but the photos are all that's available. Power turns on and sound comes from the speaker. I do not have any further knowledge, so I cannot confirm any other functionality. m(__)m Someone with more expertise should be able to verify its operation. To prevent problems, this is being sold as a junk item for parts. It has been stored by a non-professional, so there may be scratches and dirt. Please confirm the photos and only purchase if you are satisfied. It is sold as-is. There are people who try to find fault and request returns, which is a nuisance. This is a used item. Please check the photos, understand that it is a junk item, and purchase at your own risk. The main unit looks almost brand new and is in beautiful condition. This is a great item for those who are knowledgeable about electronics. I hope it can be utilized as a used, junk item. Thank you for viewing.