The DV-DVR616T4 stand-alone DVR features 16-channel full D1 recording with Mac operating system compatibility. The DVR features H.264 PLUS compression algorithm and supports iPhone, Symbian, Android and Windows mobile for mobile monitoring. It also provides HDMI 1080P video output as well as three independent video outputs. It features a graphical interface for search and playback and electronic zoom both in live and playback. Meanwhile, it supports main, spot, matrix video output independently. Other specifications are customized human voice annotation, USB 2.0 backup, dual stream bit, built-in Web server, SATA HDD, eSATA extension port as well as multiple transmission protocols (PPPoE, DHCP, DDNS and NTP).