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Model GY-651 Quantity 1 Color Blue Material PCB Features Chip: HMC5883L+BMP085; Power supply: 3-5V; Size: 13.5 x 15.8mm; Communication mode: IIC protocol; Magnetic field range: ¡À1.3~¡À8.1 gauss; Atmospheric pressure range: 300-1100hPa Application 4-axis Fly Control Sensor + Electronic Compass + Atmospheric Pressure Module Packing List 1 x Combination module 2 x Pin sets