The MPU-9250 from InvenSense Inc., Sunnyvale, CA, is a 9-axis motion-tracking device that combines a gyro, accelerometer, electronic compass, and Digital Motion Processor. The sensor module is factory tested and calibrated, consumes 9.2 mW and 6.4 mA in low-power mode, is 3 by 3 by 1 mm, and is supported by the MotionApps software platform. The compass has a resolution of 16 bits and a F.S. measurement range of ±4800 µT. Applications include mobile devices, wearable sensors, fitness watches, and remote health-monitoring applications.