The type of the service associated with an outlet or a switch.
- iOS 8.0+
- tvOS 10.0+
- watchOS 2.0+
Because different things can be plugged into outlets or controlled by switches, there is a tight association between a switch or outlet service and another service that it controls—for example, a lamp plugged into an outlet associates a lightbulb service with the outlet, even if the lamp itself is not a supported HomeKit accessory.
See Accessory Service Types for a list of service types.