This board combines 3 sensors  with 9DOF  (three-axis gyro + three axis acceleration + three axial magnetic) into a single tiny package. Convenient to  used together as an inertial management unit.

They are all accessible via I2C communication protocol (fully compatible with 3.3V - 5V systems, including Logic Level Converting  circuit).

Sensors included on the board 

• ITG3205 (3-Axis Digital Gyroscope Sensor) include an embedded temperature sensor.
• ADXL345 (3-Axis Digital Accelerometer).
• HMC5883L (3-Axis Digital Compass).

Pin connection

• VCC   For 5v  if use with 5v level system Such as ( Arduino UNO, Leonardo, Mega)
• 3.3 v   For 3.3v if use with 3.3v level system Such as ( Arduino Due, Raspberry pi )
• GND - Ground
• SCL - I2C Clock
• SDA - I2C Data