Installation Dimension: 52mm (2") Material& 65306;Made of high-strength engineering materials, it is durable IP67 ,waterproof, dust-proof grade and anti-fogging protection. Rudder Angle Gauge Function& 65306;Having a polarity-protected double-layer anti-fog glass with a threaded back cover that is screwed directly onto the dashboard& 65307;Can accurately indicate the direction of the boat in motion and avoid collisions;Use the Phillips coil to drive the pointer, which has good durability and anti-vibration function. Rudder Angle Sensor Function& 65306; Be mounted on the stern Indicator cylinder;the internal reed switch is used to collect signals or use a winding resistor to collect signals. Fitment: Suitable for marine, boat, yacht etc. Specification: Dial: Black Bezel: Chrome 316L Signal: 0-190 ohm Range: PORT-STBD Working Voltage: 9-32V (12V/24V) Operating current: 60mA Operating temperature: -30~+75& 8451; Storage temperature: -40~+85& 8451; Package Includes: 1 Piece Rudder Angle Gauge 1 Piece Rudder Angle Sensor 1 Piece Harness Note: Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) Rudder Angle sensor :Blue line is connected to the negative pole, red line is connected to the positive pole, black line is connected to G, orange line (orange light) / yellow line (yellow light) - 2 select 1 positive pole Rudder Angle Indicator& 65306;S1 is connected to the negative pole & 65292;G is connected to the black line.