Undefined Technologies, in partnership with the University of Miami, is developing a silent cargo drone powered by ion propulsion aimed to disrupt urban cargo delivery. The novel Air Tantrum technology creates a technical and commercial opportunity for ion thrusters to become a viable electric propulsion option. With this innovative technology, noise levels below 70 decibels will be reached, complying with the noise restrictions established by major county ordinances throughout the country. Founded by Tomas Pribanic in 2018, Undefined Technologies is headquartered in Doral.