It is a Power Converter for use in the US. You can plug any 220V EU device and use it in locations with US plug.
Highly recommended to use with the RF Power Strip included in our Open Garden Platform.
If you are interested in Internet of Things (IoT) or M2M projects check our open source sensor platform Waspmote which counts with more than 100 sensors available to use 'off the shelf', a complete API with hundreds of ready to use codes and a low consumption mode of just 0.7µA to ensure years of battery life.
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