1080P CCTV Security System Kit HD 4CH HDMI DVR Home Outdoor Camera Night Vision

The Difference between the system with hard drive and without hard drive. Hard drive is for data storage. That's means the system with hard drive would be able to record and playback.

The system system without hard drive would not record. Option: 2x Bullet Cameas;No Hard Drive. 4 channel DVR with 2 bullet cameras. 4 channel DVR with 2 bullet cameras and 500GB hard drive pre-installed. 4 channel DVR with 4 bullet cameras.

4 channel DVR with 4 bullet cameras and 500GB hard drive pre-installed.