The RX 450h comes equipped with a highly advanced voice-recognition system. With this technology, placing compatible Bluetooth® enabled  phone calls and operating commonly used features like climate control and audio are remarkably simple.
Voice-command technology incorporated into the available Navigation System , takes voice recognition to new heights. It enables you to place compatible Bluetooth enabled  phone calls and operate climate, audio and navigation functions using more natural phrasing. If you say, "It's too hot in here," for example, the climate control will automatically lower the temperature by four degrees. "Call Steve at work" will be met with just that. And, if you say, "Show me Chinese restaurants," from the destination menu, the navigation screen will display locations in your surrounding area.