How does a phone system work for car to pit communications?

Unlike a regular phone call, the Stilo Verbacom is a continuous phone call, but is voice activated from the car, and a push to talk button from the pit lane, so the line is only open when activated by the individual.

What are the benefits of the Verbacom Phone system?

Verbacom offers real benefits over radio PTT systems: Coverage, No Licenses & Worldwide usage. Mobile phone coverage is dramatically better than radio, radios need large booster masts to cover black spots at race tracks, and, as long as you have a sim card, the system needs no other official documentation needed!!