Q-See QT428-418-5 8 Channel DVR with 500 GB HD, 4 CCD Cameras 420 TVL , MAC OS 10.6 Compatible and Smartphone Viewing The Q-See QT View mobile app for iPhone/iPad and Android, enables you to view your property anywhere, at any time. Receive instant e-mail alerts, view live feeds, add/change video feeds, watch previously recorded video, move PTZ cameras, save or email still images, change DVR settings, and much more.