-Applicable to various speed RPM sensors to display the engine speed-Using the moving magnet principle to drive the pointer, with good durability and strong shock resistance-IP67 waterproof and dustproof rating-The whole series of stepper instruments adopt stepper motors, which have functional Features of low consumption, long life, high precision - with curved glass (with anti-fog function) - ultra-wide working voltage design (long-term working voltage: 9-32V, up to: 36V (1 minute))<br> - Installation size: 52mm (2") - Indicating range: 0-3000RPM / 0-4000RPM / 0-6000RPM / 0-8000RPM - Speed ratio: 1-300 adjustable - Working voltage: 9-32V (12V/24V) - Backlight: Red - Functions: Current tachometer/RPM and hours - Operating modes: LCD display, stepper motor<br> 1x Tachometer 1x Multi-plug socket 1x Installation instructions<br> For gear speed measurement combined with signal stability, operating temperature It has the advantages of wide range, small size and simple assembly. It has a wide measuring range and can measure zero rotation speed - M16*1.5 (2-wire system). Operating temperature: -40 ~85. Output signal: sine wave signal. Duty cycle: 475%. Inductance distance: less than 1mm Tooth module: 2~6 Connection method: two-wire Protection level: IP65 Length: L=100MM L1=80MM-M16*1.5/M18*1.5 Hall tachometer (3-wire system) Working temperature: - 40 ~85 Output signal: square wave Inductance distance: less than 2mm Working voltage: 8~32V with polarity protection Connection method: three-wire Protection level: IP65 Length: L=80MM L1=70 / L=80MM L1=60MMM18*1.5 M16 *1.5 Operating temperature: -40 to 85 Output signal: sine wave signal Duty cycle: 475% Inductor distance: less than 1mm Tooth module: 2~6 Connection method: two terminal connection