Thank you for viewing. KOJO TECHNOLOGY Virtual Earth Box VE-01. - Model: VE-01 - Manufacturer: KOJO TECHNOLOGY This is a virtual earth device that has become a hot topic in car audio in recent years. By adding it to the ground of your car audio system, it provides an earth effect equivalent to about one tatami mat (approx. 1.8m²), leading to improved sound quality. The effect varies depending on how you connect it and the wiring used, so why not try to find your favorite setup? I intended to use it carefully, but it is not new, and it is a used item, so please understand.