The Sierra Lido Tachometer/Hourmeter features a crisp white dial and fire orange pointer tip. Red through-dial and white perimeter lighting provide great night readability. Scratch-resistant curved glass lens with polished stainless steel near-flush bezel. May require alternator tap. Sierra Part 65671P.• Dial Range: 0-4000 RPM• Tachometer/Hourmeters (Electric): Diesel Alternator• Sender Code: See "T"• Alternator tap: May require alternator tap• 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" Scratch-resistant curved glass lens Polished stainless steel bezel | Lido 3" Tachometer/Hourmeter in Red