1) Home Electricity Energy Monitoring System: The monitor is an intelligent instrument for monitoring and managing the electricity consumption in the home or building, which is composed of the receiver, transmitter and sensor.<br> 2) Real-time monitor the electricity usage: Monitor home electronic appliances, with cost calculations built right in. Display hourly/daily/weekly/monthly electricity consumption, CO2 emission. View historical for your energy usage in historic graphical chart. Audible alert to notify of excessive usage of electricity.<br> 3) REDUCE YOUR ELECTRICITY BILL: Measure power consumption in and cents to see exactly how much particular devices are costing you. Educate family to use energy effectively, reduce waste, cut costs down 30% which change your energy usage habits to do something for environment protection.<br> 4) EASY INSTALLATION: Easy to install and program. No electrician required. No need to change your existing meter (sensor' clip can be installed directly onto your existing breaker box )<br> 5) Audible alert to notify of excessive usage of electricity<br> Material: plastic<br> colour: white+black<br> Package Contents:<br> 1 x Wireless Power Meter<br> 1 x Transformer<br> Only the above package content, other products are not included.<br> Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.