Autopilot Buddy, a third-party “cheat” accessory that allows users to drive Tesla’s hands-free, is now being blocked by regulators from marketing and selling the product.

In a cease-and-desist letter, by the National Highway Traffic Safety Administration, it is ordering device maker Dolder, Falco and Reese Partners LLC from offering the $199 device, citing the increased risk to passenger safety The weighted, u-shaped device, marketed as a “Tesla Autopilot Nag Reduction Device” is clipped to the side of the steering wheel, tricking the system into believing a human hand is on the wheel, bypassing its sensors and warning messages.

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“By preventing the safety system from warning the driver to return hands to the wheel, this product disables an important safeguard, and could put customers and other road users at risk,” said Heidi King, NHTSA deputy administrator, in a statement.

A Tesla spokesperson also expressed support for the move.

“We support NHTSA’s action regarding this product,” said the spokesperson in an email statement.