In 2008 Nissan announced the development of the world’s first Mobile Phone with built-in Intelligent Key. Nissan’s Intelligent Key system employs two-way wireless communications technology to automatically unlock/lock the car door and start/stop the engine. Nissan and Sharp has now integrated these electronic intelligent-key, wireless communications and electromagnetic technologies into the new handset. The Mobile Phone with Built-in Intelligent Key is still in prototype. Models available only in Japan.