SmartSF 8CH NVR 5MP Wireless Security Camera System WiFi Outdoor 3TB HDD. 24/7 Recording Day & Night. Bullet Security Camera System. 5MP Super HD & 100 ft Night Vision. 1/2.8” CMOS sensor, digital WDR, BLC & HLC ensure ultra-clear 2K 3MP Super HD clarity regardless day or night. 3 powerful infrared LEDs deliver up to 100 ft/30 m night vision range. You may identify objects in any lighting condition. Smart AI Human Detection. Equipped with the latest AI algorithms, the security camera is capable of recognizing a human among all objects. Never be bothered by animals or vehicles. 265+ plus AVBR video coding compresses videl file sizes 50% more efficiently than H. 264, saving you lots of hard drive space. Equipped with an adjustable mounting bracket, the camera can be easily mounted on the ceiling or wall. By use wireless, we meant it works by wifi, no need internet cable. But each camera indeed need a power plug to get electricity. We can’t accept return as for the reason of not wireless. Like I shown in pictures, they need power supply!! Independent and Reliable Video Security Camera System.