You need this control unit to run the Defi BF gauges! - Driving data can be stored and can be replayed up to 3 minutes(*1). Pause, speed play, forward, and rewind function can be applied during playback. - Double Warning function by a meter's LED lamp and a beep(*2) - The switch panel is embossed and buzzer sounds by pushing the buttons. - The characters and the rings on the switch panel are illuminated in white at nighttime. It makes operation in the dark easy. - Defi-Link Indicator(sold separately) can be connected to M-WARNING connector. The indicator blinks when any of connected meters' warning LED light. - Differential pressure between fuel pressure and turbo can be shown if both of fuel pressure meter and turbo meter are installed.(*3) - UP to 7 gauges among from Defi-Link Meters and Defi-Link Meter BFs and Defi-Link Displays can be operated with one Control Unit II. Microcomputers are equipped with meters and Control Unit II. A distant meter can be operated at hand. DAISY CHAIN connection can not be applied to connect Defi-Link Meters and Defi-Link Meter BFs.