Perfect to keep an eye on any room in the home or office. HD Mask Noir doesn?€?t just look like a charger ?€? it is a charger. A USB port ensures no one will remove the camera from the wall because they need to charge their phone or tablet. It also provides a convenient excuse to keep one in every room. HD Mask Noir plugs directly into the wall and therefore needs no wires and no battery. Once plugged in, it goes to work instantly and will not turn off or die due to lack of power.