SPT-1 Type Power Cord Set with In-line Switch 

SPT-1 is a type of electrical cord commonly used for light-duty applications. A cord set refers to a length of SPT-1 cord that has been terminated with a plug, allowing it to be easily connected and disconnected.

An SPT-1 cord set with an in-line switch installed includes a switch located along the length of the cord, allowing the user to turn the connected device on and off without having to unplug the cord. The switch is typically located a few inches or feet away from the plug end of the cord, and may have a sliding or rocker style mechanism. These types of cord sets are often used for lamps, small appliances, and other devices that require frequent turning on and off.