This is an LED kit that flows in an X-Y coordinate system. It's a new, unopened product. The lights flow vertically, horizontally, and diagonally, and you can control the direction and speed of the flow with switches and knobs. There are 81 LEDs arranged in a 9x9 grid, and nearly 100 solder joints are required, so it's a good practice project for soldering. Images 7 and later are of the one I assembled (I bought two of the same kit). Please note that this does not include the power cable, which is not part of the product. The photos were taken with a low-end smartphone, so the shutter speed is slow, and the flowing LEDs don't photograph well, but in reality, they appear to flow properly. Since this is an unopened product, returns will not be accepted once it has been opened. Returns will also not be accepted due to the buyer's reason, such as "it seems difficult to build..." Please understand this before purchasing. #ElectronicWork #ElectronicWorkKit