Name: electronic compass atmospheric pressure module (three-axis magnetic field + pressure); Model: GY-652; The use of chip: HMC5983 + BMP180; Power supply: 3~5V (internal low dropout regulator); Communication modes: standard IIC communication protocol); Magnetic field range: +/-0.88~+/-8.1 gauss; Pressure Range: 300~1100hPa; Chip 12bit AD converter, 16-bit data output; Machine welding process to ensure quality; Size: 13mm x 14mm (standard pitch 2.54mm); ARDUINO test code.