The Mi Home House Monitor is part of the Mi Home home automation range. This allows you to monitor the power and energy usage of your entire home. The Monitor sensor clamps onto your mains power cable by the electricity meter and sends power readings to your Mi Home network via short-range radio signals from its transmitter unit. This then allows Mi Home to calculate the energy you are consuming in your property over time. Add to your existing MiHome system to read your whole property energy usage in the App. Shows instant usage in Kilowatts plus hourly, daily, weekly and monthly usage in Kilowatts and in money £GBP. Battery operated [3 AA included]. Easy install, no tools required. Simply insert batteries, place cable clip over the live or neutral incoming cable at your meter box or consumer unit and complete the set up in the App. Specifications Whole House energy monitor Monitor household energy consumption from your Smartphone, Tablet or PC MiHome Gateway required for this product to work (sold separately) High accuracy chip provides real-time energy consumption Real-time energy usage read every 10 seconds Monitors 2W-7.2kW, single phase Provides instant and cumulative energy use Understand which appliances are costing the most to run FREE iOS and Android App, plus browser interface The app shows usage in money as well as kilowatts 3 AA Batteries included Power Source: AC Dimensions: D 2.5 x W 6.8 x H 10.3 cm Colour: White What’s Included 1 x Mi Home whole-house energy monitor 1 x Clamp 3 x AA batteries