XMII (also known as Transmission 4.1) is a live-in-studio album by British progressive rock band Porcupine Tree, released in June 2005. It is the band's second session for XM Satellite Radio and was recorded on 21 July 2003. Unlike its predecessor, XM, XMII contains mostly tracks from the Lightbulb Sun album. The album was issued on the band's own Transmission label and sold only at shows and through Porcupine Tree's online store, Burning Shed.