BMP180 Digital Barometric Pressure Sensor Board Module Compatible With Arduino by Atomic Market Size: 21mm x 18mm 1.8V to 6V Supply Voltage Max I2C Speed: 3.5Mhz Low power consumption - 0.5uA at 1Hz I2C interface Full calibrated Pressure Range: 300hPa to 1100hPa (+9000m to -500m)