Beautiful Sound That Speaks To You. Sophisticated, stylish and compact, Harman Kardon Citation ONE MK 3 is an all-in-one next generation smart speaker that delivers rich, room-filling sound. Easy to use, with intuitive touch control, Harman Kardon Citation ONE mkII allows users to enjoy innovative features, including AirPlay and Chromecast built-in, where music lovers can access more than 300 music streaming services. Additionally, the Google Assistant provides convenient voice control for hands-free help with your music and around your home.