Please note that this item has been stored for a long period, and the outer box may have scratches, stains, discoloration, and other signs of aging. We appreciate your understanding and encourage you to consider purchasing this item. EX-150 Learning Kit for Electronic Circuits - Learn the basics! - Model: EX-150 - Type: Electronic Block - Accessories: Guidebook included - Function: Learn electronic circuits from the basics Thank you for viewing.