Florida-based Undefined Technologies has introduced a new generation of its “silent” commercial drone that uses an ion motor instead of a propeller. Two flight tests have already been carried out. The project received approximately $2 million in funding.

You can see the new prototype in the air in the pictures below. However, the video is edited, so it is impossible to verify the exact duration of the flight. It also cannot be called 100% silent. But Undefined Technologies says it will be quieter compared to current rotorcraft.

The final prototype flew for about 25 seconds and made about 90 decibels of noise. Undefined Technologies says the new Ventus drone flew for about two and a half minutes and dropped to 85 decibels. The ultimate target is about 70 decibels, or the same as the DJI Mavic. But they want to implement the idea in a larger glider with some capacity.

Silent Ventus is a shining example of our intention to create a sustainable, progressive and less noisy urban environment.

Thomas Prybanik, Founder and CEO of Undefined Technologies

It is unclear how the company plans to continue reducing noise levels in the device, which no longer has moving parts in the switchboard. The company doesn’t make any promises about range or durability at this stage, either. The Ventus drone ionizes the air to create lift without moving the motors.