Barometric Pressure Sensor - BMP180 Breakout (GY-68)

This is a simple breakout board for the BMP180, a high-precision, low-power barometric pressure sensor made by Bosch Sensortec. The range of measurement is from 300hPa to 1100hPa. The sensor can be supplied with voltage ranging from 1.8V to 3.6V. Operating temperature range is -40 to +85 °C.

This particular breakout board (or perhaps the configuration) is produced by Shenzhen Keep Power Electronic Co., Ltd., and is commonly found on eBay, AliExpress, and many other online stores.