I only received the SMD board and it's parts. I did not receive the "Thru-hole" pcb and parts. I didn't receive any documentation or schematic. No idea of parts placement on SMD board. Shipping could have been faster.
Even though I ordered pre-assembled I had expected the circuit diagram to be included. I was disappointed with the volume. I sent a question asking about an amplifier to increase the volume, but did not receive a reply. It is well made, but as piecing as I had hoped. I replaced the speaker supplied with a bigger one which improved the sound.
My grandson is still too klutzy to put this together but he finds it fascinating, especially how they can go faster or slower. "How does it know?" At a faster setting, they're almost like a strobe. I was hoping they would fade in and out slowly like the LED on my Macbook.