Feature●Product Name : Magnetometer Sensor;Model : GY-273●Chips Model : HMC-5883L;Power Supply : 3V-5V●Measuring range : +/- 1.3-8 Gauss;Mounting Hole Dia : 3.5m_m/0.14i_n●Total Size : 18.5 x 14 x 3m_m/;Weight : 2g●Package Content : 1 x Magnetometer SensorDescription Immersion Gold PCB, machine welding process to ensure quality.