General description Digital GPS Speedometer designed for marine use, featuring a 3-3/8'' diameter gauge that accurately displays speeds from 0 to 160 MPH. This speedometer is built with high-quality materials and offers a variety of features suitable for vehicle modifications. Technical specifications Material: 316 Stainless Steel + ABS Plastic Install Diameter: Φ85mm or 3-3/8'' Signal: GPS Working Voltage: 9~32V DC Working Current: ≤100mA Operating Temperature: -30℃ ~ 75℃ Storage Temperature: -40℃ ~ 85℃ Waterproof and Dustproof Grade: IP67 Indication Range: 0-160MPH Backlight: 7 Colors (Red, Yellow, Orange, Green, Blue, Purple, White) Compatibility and accessories Package includes: 1x 85MM Digital GPS Speedometer Gauge 1x Instruction Manual 1x GPS Antenna Installation Professional installation is recommended for optimal performance. Usage Suitable for all kinds of vehicle modifications. Features a high-brightness LED backlight for visibility. Utilizes a stepper motor drive pointer