• Name: Electronic compass atmospheric pressure module (three-axis magnetic field + Pressure)
• Model: GY-651
• Use the chip: HMC5883L + BMP085
• Power supply: 3-5V (internal low dropout regulator)
• Dimensions: 13.5mm x 15.8mm (pin spacing standard 2.54mm)
• Communication modes: standard IIC communications protocol
• Magnetic field range: ± 1.3 to ± 8.1 gauss
• Pressure range: 300-1100hPa
• Chip built-in 12bit AD converter, 16-bit data output