What wireless means in practice
Wireless cameras are almost always about the data connection, not the power. The images are transmitted via Wi-Fi to your network, but the camera itself is still usually attached to an adapter or power cable. Only battery-powered cameras are truly cable-free, and they do provide something for that. Anyone who thinks wireless means there is no need to be plugged in anymore is often deceived during installation. The second point is range. An outdoor camera is by definition mounted behind a wall, and it is precisely concrete, insulation tape, and metal frames that suck up Wi-Fi. Two signal bars on your phone inside tell nothing about what the camera behind the facade is receiving. Video is also much heavier than regular internet traffic: a camera that gives blurry images is usually not a broken camera but a connection that is just too tight. Interference also plays a role. The 2.4 GHz band is crowded, especially in a residential neighborhood or apartment complex, and that's where your microwave and the neighbors' Wi-Fi are also connected. 5 GHz is cleaner and faster, but it penetrates walls less effectively. For a camera in the back of the garden, 2.4 GHz with a good access point is often more realistic than 5 GHz that just doesn't reach.
