Name: PulseSpeedometer Materials: stainless steel+nickel-plated plastic Operating Voltage: 12V/24V Connection: Red-Battery+9-32VDC Blue-Battery- Orange-Backlight+9-32VDC Black-Sensor Indicating Range: 0-120KM/H, 0-200KM/H Input Signal: The signal comes from pulse signal Protection Class: IP67, can work underwater 1m position Be suitable compatible for all kinds of speed sensor, and display the speed and mileage of vehicles The gauge has the advantages of high precision, quick location confirmation and short start up time. Stepper motors used compatible for full range of stepping gauges, great feature with its less power consumption, longer life, higher precision, etc. With curved glass with anti-fogging function With ultra-wide working voltage design long-term operating voltage: 9-32V, Maximum up to: 36V 1 min. Instructions: Becompatible for e installation, firstly, to open a holeDiameter: 85~87mm of the panel, make sure there isa space with 70mm backyard of panel as well Put the gauge in the hole. Using M4 nut and C type bracket to seal up the gauge. Notes: Due to the manual measurement, there might be some error. 1 x Speedometer1 x Cable1 x Owner's Manual