Check the listing for details. 2 pieces GY-BMP280 Pressure Sensor Module Arduino High Precision Atmospheric. Condition: New. Listed at 8.99 USD. 2 Pieces BMP280 Pressure and Temperature Sensor Package Includes2 x BMP280 Pressure Sensor Module Arduino High Precision Atmospheric2 x Straight 4x1 2.54mm Headers Bosch has stepped up their game with their new BMP280 sensor, an environmental sensor with temperature, barometric pressure that is the next generation upgrade to the BMP085/BMP180/BMP183. This sensor is great for all sorts of weather sensing and can even be used in both I2C and SPI!This precision sensor from Bosch is the best low-cost, precision sensing solution for measuring barometric pressure with ±1 hPa absolute accuracy, and temperature with ±1.0°C accuracy. Because pressure changes with altitude, and the pressure measurements are so good, you can also use it as an altimeter with ±1 meter accuracy Typical application：Enhancement of GPS navigatione.g. time-to-first-fix improvement, dead-reckoning，slope detectionIndoor navigation（floor detection，elevator detection）Outdoor navigation，leisure and sports applicationsWeather forecastHealth care application（e.g. spirometry）Vertical velocity indication（e.g. risk/sink speed）Target devicesHandsets such as mobile phones ,table PCs, GPS devicesNavigation systemsPortable health care devicesHome weather stationsFlying toysWatchesPCB size:(L*W)1.52* 1.20cm/0.60"*0.47"