D1, CIF, QCIF Resolution Support Dual Stream 25/30FPS RTSP Support External USB Drive Support RS485 Bus for External PTZ FeatureH.264 CompressionD1, CIF, QCIF Resolution Support 25/30FPS Real-time Dual Video Streaming RTSP Streaming 4GB Built-in Memory, Support Max 16GB Record Mode: Motion, Schedule, Manual 1Ch. Audio In/ Out 10/100M Adaptive Ethernet Port Alarm Snapshot Email and FTP Recorded ...