Features: With a standard size, easy to install. Have good stability, high measurement precision-. Strong anti-jamming- capability. Quality material, has long service life. Meet your need-. Specifications: -Color:Red,Green,Blue -Power requirement: for DC8-24v -Measure-range: 10-9999RPM -Clear zero: Automatic -Display refresher- rate: 3 Time-/Second -Measure indication: RPM5000,±3 -Display: Green 0.56" LED -Response frequency: 100HZ -Tachometer dimension: 79x43x25mm -Panel cutout Dimension: 76x39mm -Sensor Dimension: 12x55mm -Proximity- output current: 30mA -Sensor wiring: brown-Power+;blue-Power-;black-signal -Operating temperature: -10 to 50°C. -Operating humidity: 10 ~ 80% (without condensation) -Operating pressure: 80 ~ 106kPa -Cable Length: Approx. 120cm/47.24in Package Includes: 1.Please allow 1-2mm error due to manual measurement. Please make sure you do not mind before you bid. 2.Colors may differ slightly from the pictures. note: 1x LED Tachometer RPM- Speed Meter 1x Hall Proximity-Switch Sensor NPN-