Nine-axis modules (three-axis gyroscope + triaxial accelerometer + three-axis magnetic field)Immersion Gold PCB processChip: ITG3205 + ADXL345 + HMC5883LPower supply :3-5vMeans of communication: IIC communication protocol (fully compatible with 3-5v system containing LLCcircuit)Size: 2.2cm * 1.7cm