Schneider Electric GUG101W 1-Pole 1-Way Switch Module is an electrical switch used in household or commercial wiring. The switch controls a single circuit. It can turn on or off one set of lights or one electrical device. 1-Way is the switch can only be turned on or off from one location.

A Switch Module is a component that can be installed into a modular switchboard. 1 Gang is the number of switch buttons or levers on the faceplate of the switch. It is a single-gang switch, meaning it has one set of controls. Multi-gang switches have multiple sets of controls on the same switch plate.

So, the Schneider Electric GUG101W 1-Pole 1-Way Switch Module is a basic electrical switch that controls a single circuit, can only be operated from one location, and has a single set of controls on a white faceplate. This type of switch is commonly used in homes and offices for controlling lights or other electrical devices.