BMP180 is a high-precision, small size, ultra-low power pressure sensor that can be used in mobile devices, perfect for your project. The absolute accuracy of the lowest can reach 0.03hPa, and low power consumption, only 3 A. BMP180 uses a powerful 8-pin leadless ceramic chip can be directly connected with a of microprocessor via I2C. Pressure range: 300 - 1100hPa (+9000m to -500m) Application for:GPS precise navigation;Indoor and outdoor navigation;, sports and health monitoring;Weather forecast;Vertical speed indication. colour:Blue Material:Plastic + Metal Package Contents: 5 x BMP180 Pressure Sensor Module Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.