As our summers get hotter, our air conditioners have to work harder. The Mistbox is here to help. It attaches to your outdoor unit and automatically knows when your A/C kicks on, spraying a fine mist that cools the incoming air, so your unit doesn't have to work as hard or run as long. It's simple to install, with just a few necessary pieces and connections, and it uses a wind turbine mounted on top to generate power and charge the battery — after all, there's no sense in lowering your A/C bill with another gadget that's eating up electricity itself. You can pay for the hardware with a monthly subscription that includes unlimited replacement water filters, or buy it up front and pay less per month.