A power strip is a block of electrical sockets that allows multiple devices to be powered from one single main-line power socket. They are typically plugged into the wall and used when many electrical devices are in close proximity to one another.
Power strips typically include a cable and mains plug, a circuit breaker, a master switch, and built-in surge protectors. The power strip draws electricity from the main power supply, delivers power to several devices plugged into each socket, and protects equipment from overload and short circuits. Strips with surge protection limit peak voltage, achieving additional protective effects.
Power strips vary by shape and size, outlet orientation, the maximum power output of strip, and other features like trip capacity and peak voltage rating.