A prototype active suspension system, using electromagnetic motors instead of hydraulic/pneumatic power, was unveiled by the company in 2004 and was due for release in 2009, but it did not materialize due to weight and cost. The system used electromagnetic linear motors to raise or lower the wheels of an automobile in response to uneven bumps or potholes on the road. The wheels are raised when approaching a bump (or lowered into a pothole) to keep the vehicle level, using similar principles to noise cancelling audio devices. A prototype car had the ability to jump over an obstacle. The company said that the system is too expensive and heavy, even after development over more than 20 years costing $100 million of development. In November 2017, it was reported that Bose had sold the technology to ClearMotion. In May 2018, it was announced that five major car manufacturers had expressed interest in the technology and that it may be available in 2019 for low-volume vehicles and by 2020 for the mass market.