Spring time is almost here. Before you know it, it will be summer, and you will need to turn your air conditioner on. If you are not paying attention to how much energy your air conditioner is burning, you are going to end up with huge electricity bills. The Owl Wireless Electricity Monitor lets you monitor the energy use of your air conditioner in real time. You can track usage by day, week, month, or annually. The wireless design makes carrying it in all your rooms easier. The Owl monitor costs $149.95.