???Features:
Grove compatible interface.
3-Axis magneto-resistive type sensors.
I2C serial interface.
2.0cm x 2.0cm Grove module.
1▲ to 2▲ heading accuracy.
Up to 116Hz maximum output rate.
Built-In self test.

Applications Ideas:
Low cost compassing
Magnetometry
Pedestrian navigation
Hobby auto navigation
Compassing support for mobile devices and portable computers (i.e connected via Blue-tooth or UART)

Specifications:
VCC: 5.0V(3.3-6.0V)
Sleep Mode Current: 2.5uA
Idle Mode Current: 240uA
Measurement Mode(8Hz averaged) Current: 640uA
Resolution: 10 milli-gauss
Linearity(÷2.0 gauss input range): 0.1÷% FS
Output Rate: 15-116HZ
Measurement Period(From receiving command to data ready): 8.3msec