The smallest Z-Wave operated power monitoring device in the world, the Shelly Wave PM Mini Z-Wave Power Meter is designed to be installed in the electrical box of standard devices or behind pre-existing light switches and offers accurate, regular measurements on their energy usage. The Wave PM Mini is rated for measuring circuits with a load of up to 16A and records power metering information every sixty seconds to an accuracy of within 1%, with measurements stored securely in the cloud for later analysis. The Wave Mini PM supports a wide range of voltages to monitor a broad array of appliances, and can be integrated into smart scenes and schedules involving multiple Shelly devices - for example, deactivating an appliance once it's reached a certain energy usage threshold. ***Please note: a Z-Wave hub is required for the Shelly Wave PM Mini Z-Wave Power Meter to function (sold separately). For a mini power monitoring device that can operate over standard WiFi without requiring a hub, take a look at the Shelly Mini PM Gen3!