How it works:
The camera connect wirelessly to the NVR, each camera need to be 20-25 meters from the NVR.
The camera will send image wirelessly to the NVR(which you plug to a screen for image), all recording are done on the harddisk in the NVR.
If you want remote monitoring from your phone you have to plug a Lan cable from your router to the NVR

specifications:

8MP Ultra HD 
Camera can be place up to 25-30 Meters from NVR
NVR support up to 8 Camera

1 Camera can monitor 2 position
Dual-way Audio, auto tracking,humanoid detection
ColorVu at night
IP66 Waterproof
Remote viewing on phone(Internet Required)
Plug and play easy installation

Application: Icsee

Package Include:
1 Wireless NVR (8CH)
1 HDD 500GB
4 dual lensPTZ (8MP) Camera
Screws, Mouse and Power supply