The e2 wireless electricity display device is a wireless energy monitor that can tell you at a glance how much electricity your home is using from moment-to-moment and in total (day, week, month and average consumption patterns) NOW you can also upload the data to your PC. The efergy e2 electricity monitor is simple to install and use. The sensor wirelessly sends information about the amount of electricity you are using to the display monitor. The monitor converts this into kilowatt-hours, the standard unit which the electricity company uses to charge you. This shows how much you are using in the same units that are on your bill. Input the amount your energy company charges you for each kilowatt-hour and you can see how much you are spending in electricity instantly. Make instant changes to save money, energy and the environment. New advanced features New and improved display Up to 5 different currencies available (R, £, €, $, Kr) Showing per day calculations for a better understanding and feedback Increased data storage capacity: up to 24 months history data New elink 2.0 energy management software included for FREE Select up to 4 different tariff settings Improved incremental stepping on the voltage, costs, carbon emissions and alarm Audio alert if you exceed your set maximum consumption target Peak time symbol when the most expensive tariff is in use * Please note: The "R" currency symbol can also be used and displayed in the software, the above image is only for illustration purposes. Main features Portable compact display can be placed anywhere in the home View your real time energy consumption (cost, CO2 and kWh) View historical daily, weekly or monthly data (cost, CO2 and kWh) View daily, weekly or monthly average (cost, CO2 and kWh) Up to 70 m range Portable or wall mountable display 12 months minimum battery life (with 2400 mAh alkaline batteries) Mains or battery powered options for the display unit Easy to set up and use Understand your carbon footprint Specifications Model Name efergy e2 Frequency 433MHz Transmission Time 6sec. 12sec. or 18sec. Transmission Range 40m - 70m Sensor Voltage Range 110V-300V Measuring Current 50mA - 95A Memory 64K Pack Size HxWxD 20.2cm x 20.5cm x 7cm Portable Display Unit Power 3 X AAA Batteries Transmitter Power 3 X AA Batteries In the box 1 x e2 classic 1.0 portable display unit 1 x transmitter 1 x sensor 1 x Instruction manual 1 x Elink instruction manual Batteries not included