Check the listing for details. GY-BMP280 Pressure Sensor Module Arduino High Precision Atmospheric USA seller. Condition: New. Listed at 4.25 USD. Check out my other listings i have 5 of this for 10.50 For sale is 1pcs BMP280 Pressure and Temperature Sensor 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 1.0C 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 navigation e.g.time-to-first-fix improvementdead-reckoningslope detection Indoor navigationfloor detectionelevator detection Outdoor navigationleisure and sports applications Weather forecast Health care applicatione.g. sirometry Vertical velocity indicatione.g. risk/sink speed Target devices Handsets such as mobile phones ,table PCs,GPS devices Navigation systems Portable health caredevices Home weather stations Flying toys Watches PCB size:(L*W)1.52* 1.20cm/0.60"*0.47" Packge Includes 1 x BMP280 Pressure Sensor Module Arduino High Precision Atmospheric Fast free shipping from southern California... 1st class mail no tracking... Thank you