HMC5883L 3-Axis Electronic Compass Module. This Compass Module is designed for low-field magnetic sensing with a digital interface and perfect to give precise direction information. This compact sensor fits into small projects such as UAVs and robot navigation systems. The sensor converts magnetic field to a differential voltage output on 3 axis. Pack of 1-piece/lot. Brief Data: - Name: GY-271 HMC5883L Module. - Number of Axis: 3. - 16 Bit ADC With Low Noise AMR Sensors. - Sensor Chip: HMC5883L. - Power Supply: 3~5V. - Communication Mode: I2C. - Measuring Range: ±8 Gauss. Image is for package illustration purpose only. Refer product specification for detail.