Product Features: -Suitable for all vehicles, boats and off-road vehicles -The signal comes directly from the satellite signal receiver(GPS Speed Sensor) -The gauge has the advantages of high precision, quick location confirmation and short start up time. -IP67 waterproof and dustproof grade -Stepper motors used 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)). Technical Data: -Fixing dimension: 85mm(3-3/8") -Indicating Range: 0-999 -Working Voltage: 9-32VDC(12VDC/24VDC) -Functions: SOG: speed over ground TRIP: return to 0 after power off ODO: odometer auto save after power off COG: course over ground Voltmeter: 9-32VDC -Connection: Blue wire--Negative/Ground, Red wire--Power Positive -This GPS Speedometer is complete unit, can work directly with gps antenna together, not need other sensor cables. Sensor can be mounted at any position, on or under the dashboard. -After connection, it takes about 30 seconds to get signal in the first time, but less than 3 seconds after that. It gets quicker under a clear view of the sky. Sometimes if signal is missing, pls. reconnect all wires and restart it. -Operation mode: LCD display, stepper motor Package Includes: 1x GPS speedometer 1x GPS Antenna 1x Multi-plug socket 1x Installation Instruction Responsible Person Name:Apex CE Specialists GmbH Responsible Person Address:Grafenberger Allee 277-287 Duesseldorf,Nordrhein-Westfalen,Germany,40237 Responsible Person E-mail:Info@apex-ce.de