Tein EDK04-P9669 EDFC II Controller Convenient Presets: Up to 3 damping force settings can be stored into a memory; With this feature, preferred setting can be recalled instantly with only a touch of a button, according to various driving conditions; from streets, highways to winding roads Resume Feature: The system remembers the damping force setting when the ignition key is turned off and automatically returns to the same setting when the key is turned back on; (Main power switch for the controller should be on, for this function to work) Volume Adjustment: Volume of button sound can be set to level 0 (mute) and between level 1 (low) & 3 (high) Display Dimmer Function: Brightness of the display is dimmed automatically at night in conjunction with the illumination power supply; Brightness at dimmed state can be set to 3 levels Self-Diagnosis and Alert: When the system detects any abnormality (wire breakage, short circuit etc.), an alarm sound is emitted, all 3 memory buttons flash in red and an error message is displayed on the screen