The Proton RPM & hour meter will allow you to visualize the revolutions of your motor while the hour meter will keep track of the amount of time your engine has ran.

• Digital tachometer
  R: 0 ~ 20, 000 RPM
  U: 100 RPM
• Max RPM Record
  R: 0 ~ 20, 000 RPM
• RPM input pulse
  R: 0.5 / 1 / 1.5 / 2
• Total engine hour meter
  R: 0 ~ 999.9 / 1,000 ~ 99,999 H
• Hour meter A/B
  R: 0 ~ 999.9 H | U: 0.1 H
• Internal battery type
  CR 2032 Battery lifetime (continuously) ± 350 H
• Battery self consumed lifetime
  ± 5 years
• Effective temperature range
  14 ~ 140 °F (‑10 ~ 60 °C)

• Meter standard
  JIS D 0203 S2

• Meter size (L x W x H)
  11/16 x 1 15/16 x 1 5/16” (18 x 49 x 33 mm)