This is a modified product. LEDs have been added inside the clear outer parts. When attached to the Beyond Driver and closed, the LED side faces forward and lights up, making the transformation look flashy. It lights up in sync with the sound. It turns off after a short time. I believe the volume has been boosted. The sound may be louder than the standard product. I think the interlocking function should work fine, but I haven't been able to confirm it as I don't currently have the Beyond Driver. Due to the modifications, the overall condition is set to poor. [Shipping Method] Free shipping! Shipped via Mercari.