The Hand is one interesting contraption to own if you’re a huge fan of hand signs, and wish you can share your sentiments with the driver behind you. All you need to do is place it in the rear windscreen, press one of the buttons and a corresponding hand sign will show up. You will be able to choose from the following popular signs – I love you, Hang Loose, Devil Horns, The Bird, Loser , Power and Peace gestures. The Hand remote control window sign relies on electroluminescent technology, and is best used at night for optimal effect. It is powered by a quartet of AA batteries and will retail for $39.99. Do check with the local authorities for restrictions, as you might end up paying a fine for installing something illegal in your vehicle.