When the vehicle is started, Driver 1 or Driver 2 displays on the Driver Information Center (DIC). The number on the back of the RKE transmitter corresponds to driver 1 or driver 2. The navigation system can store memory points, audio presets, system settings, and last know audio mode for driver 1 and driver 2 individually. See "Vehicle Personalization" in the index of your vehicle's owner manual for more information.