. Tough, magnetically shielded, silicone-dampened vector movements are the ultimate in accuracy and reliability. The Lido's polished stainless steel bezel looks great in most dashes. Black text on a clean white background offers maximum daylight readability, while night visibility is provided by white perimeter and red through-dial lighting. Sierra Part #65129P.• Dial Range: 0-7000 RPM• Tachometer/Hourmeters (Electric): O/B & 4-Stroke Gas Engines• Sender Code: O/B ALT./COIL• Tachometer: Mariner 30 & 40 HP (2-cylinder) engines require a module (Mercury P/N 17461A2)• Voltage: 12V DC• Current Draw: 0.10 - 0.15 A• Operating Temperature: -40C to +70C• Ingress Protection: IP65• Bezel O.D.: 3.74"• Housing O.D.: 3.39"• Hole Size: 3.43" Stainless steel bezel Thru-dial and perimeter lighting | Lido 3" Tachometer in Red