Zmodo PKD-DK0866-500GB 8 CH Surveillance Security H.264 DVR With 4 IR Security Camera System 500GB Hard Drive Complete security camera DVR system with everything you need to improve home security H.264 standalone DVR with 500GB HD;1/4" color CMOS IR night vision indoor cameras network access, motion detection, VGA video output, and USB2.0 backup DVR also features the most updated 3G mobile live! Preview via mobile phone Instant Email Alerts if Activity Detected - This system is designed to send an email alert, complete with photo of the activity, if any motion is detected, or if any camera experiences video loss.