ITEM NAME:GY-273 HMC5883L Triple Axis Compass Magnetometer Sensor Module,For Arduino OZ Description: Item name: HMC5883L module (three-axis magnetic field module) Model: GY-277 Chips: HMC5883L Communication: IIC communication protocol Measuring range: ± 1.3-8 gauss Specifications: Power supply :3-5V Size: 1.8 x 1.3 cm Color:As shown in the pictures Package Included:1x HMC5883L Triple Axis Compass Magnetometer Sensor Module For Arduino 3V-5V.Size: 1.8 x 1.3 cm.