This inertial-measurement-unit combines 2 of the best quality sensors available on the market to give you 9 axes of data: 3 axes of accelerometer data, 3 axes gyroscopic, and 3 axes magnetic (compass). We tested many different 'combination' sensors and found these were the best value, with stable and reliable readings. The L3DG20 gyroscope + LSM303DLHC accelerometer/compass sensors are all on one breakout here, to save you space and money. Since all of them use I2C, you can communicate with all of them using only two wires. Most customers will be pretty happy with just the plain I2C interfacing, but we also break out the 'data ready' and 'interrupt' pins, so advanced users can interface with if they choose. A 3V regulator with reverse-polarity protection means you don't have to worry about frying the boards by accident. There's level shifting circuitry so the IMU can be used with 3 or 5V logic boards. And check out those mounting holes! You can securely attach this board to your rocket, robot, art project. Each order comes with one assembled and tested 9DOF breakout board and a small piece of header. L3GD20 3-axis gyroscope: ±250, ±500, or ±2000 degree-per-second scale LSM303 3-axis compass: ±1.3 to ±8.1 gauss magnetic field scale LSM303 3-axis accelerometer: ±2g/±4g/±8g/±16g selectable scale Specifications Gyroscope: L3G4200D Accelerometer / Compass: LSM303DLHC Operating voltage:3.3V to 5V Supply current: 8mA Output format (I2C/SPI): Gyro: one 16-bit reading per axis Accelerometer: one 16-bit reading per axis Magnetometer: one 16-bit reading per axis Barometer: 24-bit pressure reading (I2C only) Sensitivity range: Gyro: ±245, ±500, or ±2000°/s Accelerometer: ±2, ±4, ±6, ±8, or ±16 g Magnetometer: ±2, ±4, ±8, or ±12 gauss Barometer: 300hPato 1110hPa Dimensions:  33 mm × 23mm Weight without header pins: 10 g  Package Included: 1x 10DOF LSM303 L3G4200D Module