This is a low cost plane of digital compass The working principle is utilizing magneto resistive sensor sensing the Earth's magnetic field component, so as to get an azimuth angle Light weight and high cost-effective With stabile operation and high accuracy Very low operating voltage (3 - 5V DC) DC single supply operation Advanced hard iron calibration Electrical Parameters: Measuring Range: Between 0 degrees to 360 degrees Working Temperature: Between -20~85 Degrees Celsius Store Temperature: Between -40 ~125 Degrees Celsius Current Consumption: 5V 15mA, 3V 8mA Response Frequency: 25Hz Resolution: 0.1 degree Measuring Precision: 1 degree Repeatability Precision:1 degree Applications: Handheld electronic instrument Robot orientation and position Navigation system Telescope position Auto helm rudder Antenna position Automobile GPS navigation Aero model position Colour:green Material:PCB Package Contents: 1 x Electronic Compass Sensor Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.