Sky+ HD was the brand name of the HDTV service launched by Sky plc on 22 May 2006 in the United Kingdom and Ireland to enable high definition channels on Sky to be viewed. For the first two years after launch, the service was branded Sky HD. The service requires the user to have a Sky+ HD Digibox and an HD ready TV. A subscription to the original HD pack carries an extra fee of £10.25 (€15.00 in Ireland) a month in addition to the standard Sky subscription, allowing customers to view HD channels corresponding to the channel packs subscribed to. Additional Pay-Per-View events on Sky Box Office HD are not available to customers unless they subscribe to the Sky HD pack.