Compass module  is a yaw rate sensor. Employing a 3-Axis Digital Compass IC
HMC5883L and 6-axis MEMS Motion Tracking device ICM-42670-P that combines a 3-axis gyroscope and a 3-axis accelerometer. The Compass module able to measure the vertical axis in degrees.
 
Specification
Power supply voltage: 4.5 ~ 5.5V DC
Operating current: ~ 0.7 mA
Operating temperature: -40 ~ 85°C
Operating Humidity: <90%
Size: 93mm x 60 x 10 mm
Weight: 23.0gInterface: I2C
Standard-mode 7-bits address
7-bits I2C address: 0x08
Return data: 0-359

Datasheet