Test kits contain a set of equipment that is specified to work in a certain sphere, for example automotive kits have gadgets that are used for testing and repairing cars and car parts, electrician kits have devices that are used in testing and repairing electronic equipment, and network kits that have special devices and probes needed for network testing. Sets of equipment contained in different kits may vary depending on their function and price. Some kits may have pricy equipment like thermal cameras or spectrum analyzers, while others comprise simple meters and testers.