A smart key is an electronic access token and authorisation mechanism that is available either as a standard product or as an alternative security feature in a variety of car designs. The smart key helps the driver to hold the key pocketed when the vehicle is unlocked, locked and started. The key is identified by one of the several antennas in the car bodywork and the radio pulse generator in the key housing. Based on the device, the car is automatically activated when the button or sensor on the door handle is pressed. Vehicles/cars with a smart key systems have a mechanical backup, usually in the form of a spare key blade supplied with the car. Several manufacturers are covering the backup lock under the styling mask. The push-button ignition switch on the Mitsubishi RVR equipped with the Smart key instead of the immobiliser. Vehicles with a smart-key system will disable the immobiliser and trigger the ignition without putting a key into the ignition, provided the driver has a key inside the car. This is done on most vehicles by pressing the starter button or by twisting the ignition switch. Upon entering a vehicle fitted with a smart-key device, the car is locked either by pressing a button on the door handle, by tapping the capacitive region on the door handle, or by simply walking away from the car. The method of lock-up varies across models. Some vehicles automatically adjust the settings on the smart key when to unlocking a car. User preferences for example can include seat positions, steering wheel location, external mirror settings, climate control ( e.g. temperature) settings, and stereo presets are typical settings. Some car models, such as the Ford Escape, have settings to prevent the vehicle from exceeding its maximum speed if it has been started with a key.