The US Consumer Product Safety Commission has urged consumers tostop using Future Motion’s Onewheel self-balancing electric skateboard.

At least four deaths were reported between 2019 and 2021, the CPSC wrote in a Nov. 16 statement.

Future Motion refused to agree to “an acceptable recall” of its Onewheel products, the CPSC said.

It said in the release that it disagrees with the CPSC’s conclusions.

Onewheels function by having the rider balance on a board with a single wheel in its center.

As a rider leans forward, the e-skateboard picks up speed.

He says riders were often wearing helmets.

The “Are Onewheels safe?”

section of theFAQ pagepoints to a 2018video about the warning feature, known as Pushback.