https://wccftech.com/playstation-vr-breaks-3-million-units/

Sony announced today to have surpassed the milestone of three million PlayStation VR devices sold to customers. On the software front, 21.9 million games and experiences have been sold.

PlayStation VR, which requires a PlayStation 4 console, launched in October 2016. It passed the one million milestone in June 2017 and the two million milestone in December 2017.