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It,s easy to forget to turn the light out, or to leave the TV on standby. But OWL can help inform and educate you and your family so that you use less energy - effortlessly. A clip-on sensor and transmitter inside your existing meter box transmits a real-time reading to a portable LCD display that you can see. The reading shows the cost of electricity being used (or wasted!) and the amount of CO2 gases you are contributing to the environment.