Nine axis modules (three-axis gyro + three axis acceleration + tri-axial magnetic field +BMP085 ). * Using immersion gold plating PCB process. * Module chips: L3G4200D+ADXL345+HMC5883L+BMP085. * Power supply: 3V-5V. * Communication mode: IIC communication protocol (fully compatible with 3-5V systems, including LLC circuit)