The NBA has a very strict policy on gadgets and gizmos that could provide an advantage to one player or team.

For most of the month of March, Cavs backup point guard Matthew Dellavedova had been wearing a device on his wrist that helps him monitor bodily activity and health called the “Whoop,” as stated by Tom Haberstroh of ESPN.

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The device that had been occupying Dellavedova’s wrist is called a Whoop, and it’s built to track fancy stuff such as heart rate, body temperature and body movement during both awake and sleeping hours. Think Fitbit, but for the million-dollar athlete. (It is not, mind you, built to help a point guard’s shooting, so any correlation between Dellavedova’s poor showing and the absence of his Whoop is surely coincidental.)

According to Haberstroh, the NBA informed Dellavedova about the incident, but was not fined or issued any sort of punishment for wearing the device that has been banned for over 10 years.

On Thursday last week, the league office was made aware of Dellavedova’s gear and informed the Cavaliers that it would not allow the health tracker to be worn during the game. Ever since, the black strap on Delly’s wrist has disappeared.

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Now, a health tracking device may not seem so harmful, but its still a very dangerous device to have and, as Haberstroh states, a hit right to someone in the nose, the eye, or the jaw could very well cause some damage.