The event traces its roots back to an industry imitative organised in Wetzlar and Mittelhessen, and its objective is to interlink the four sectors of optics, photonics, electronics and mechanics. The aim is that new interfaces and points of contact will pave the way for forward-looking technologies. The trade fair debuted at the Rittal Arena in Wetzlar in February 2014. The W3+ Fair is organised by the Hamburg-based company, FLEET Events (fleet-events.de). In September 2019, the W3+ Fair Rhine Valley celebrated its premiere in the four-county region. In 2023, the organizer is expanding its portfolio to include the W3+ Fair Jena.