Spanish 
The HMC5883L is a surface-mount, multi-chip module designed for low-field magnetic sensing with a digital interface for applications such as low- cost compassing and magnetometry
Using a magnetometer can be a little tricky, especially if you are unsure about the formulas to use to get the correct bearing and when other magnetic objects are interfering with your signal. You could download a arduino library for this module, which will also be compatible with other HMC5883L breakout boards made by other manufacturers.
Electronic Feature :
- Immersion Gold PCB, machine welding process to ensure quality.
- Name: HMC5883L module (three-axis magnetic field module).
- Use the chip: HMC5883L.
- Power supply: 3V ~ 5V.
- Communication modes: standard IIC communication protocol (3.3V~5V TTL).
- Measuring range: 1.3-8 Gauss.
- Size: 14mm x 13mm
