BMP180 is a high-precision, small size, ultra-low power pressure sensor that can be used in mobile devices, perfect for your Arduino project. The absolute accuracy of the lowest can reach 0.03hPa, and low power consumption, only 3μ A. BMP180 uses a powerful 8-pin leadless ceramic chip can be directly connected with a variety of microprocessor via I2C. Pressure range: 300 - 1100hPa (+9000m to -500m) Application for:GPS precise navigation;Indoor and outdoor navigation;Leisure, sports and health monitoring;Weather forecast;Vertical speed indication. colour:Blue Material:Plastic + Metal Package Contents: 20 x BMP180 Pressure Sensor Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.