Faria Beede Instruments Tachometer 7000 RPM All Outboard Coral w/Stainless Steel Bezel 4". The tach is hooked up to +12VDC Ground and one of the signal sources listed above. By selecting the right tach and setting the switch on the back to the correct position you let the tachometer know how many pulses are sent per each engine revolution. These tachometers have a warning light system built into the dial that show off warning indicators when a fault is detected from the engine. Specifications for Faria Beede Instruments 4" Tachometer 7000 RPM All Outboard Coral w/Stainless Steel Bezel: Manufacturer: Faria Beede Instruments Color: Silver Features of Faria Beede Instruments 4" Tachometer 7000 RPM All Outboard Coral w/Stainless Steel Bezel 4" 7000 RPM All Outboard Stainless Steel Bezel Package Contents: Faria Beede Instruments 4" Tachometer 7000 RPM All Outboard Coral w/Stainless Steel Bezel Faria Beede Instruments 33005: Tachometer 7000 RPM All Outboard Coral w/Stainless Steel Bezel 4"