NVR specification: 

Operating System: Embedded linux OS
Video resolution: 4ch 720P(1280 × 720) HD NVR with built-in Router
VGA & HDMI outputs up to 720P.
4 channel sync-playback.
Video / capture mode: Manual、Time、Motion、Alarm.
Playback mode: Realtime、Routine、Event.
HDD: Support 3.5″ SATA HDD up to 6TB
Power: DC 12V2A
Consumption(excluding HDD)

Product Features

• 4ch HD 720P(1280×720) wireless network camera system provides more clear & crystal Image and capture more details in a larger area. NVR built in router and two wifi antennas, so the wireless range can cover 1500ft in open area, up to 250ft with obstacles (Between one wall and three walls).
• Remore view anywhere: View the system on mobile App from anywhere and anytime; You can download IP PRO app from Android Google Play or Apple APP Store to spend minutes to set up on phone. Or easily connect to your tablet or PC to view. Besides, you can scan the QR code on the PC to download App.
• Motion Detection Recording, Receive email alerts upon motion detection. Synch-playback, video backup, video playback and video detection.
• Support 1 sata port & max video storage 6TB & 2 USB 2.0 port for operation of mouse control, back up. Plug & Play: The system will auto run when power on the NVR and 4 cameras in wireless mode.
• Kindly notice: This HDD is not included for this AKASO WIFI 960P system and also this ip camera is IP66 Weatherproof. Besides, pls note that this wireless security system does not mean you can use the system without any cables but power supply is needed for supplying power to cameras and NVR and if its necessary when you first connect the camera and NVR, you can connect them with ethernet cable to match wireless code as a result of wireless using.