Features: The BMP280 is an absolute barometric pressure sensor especially designed for mobile. Great for all sorts of weather sensing and can even be used in both I2C and SPI! Low-cost, precision sensing solution for measuring barometric pressure with ±1 hPa absolute accuraccy. This barometric pressure sensor is soldered onto PCB, durable & long for time service. Due to pressure changes with altitude, and the pressure measurements are so good, you can also use it as an altimeter with ±1. Specifications: Material: ABS Size: 15x11.5mm/0.59x0.45in Measuring range: 300-1100hPa Voltage: 3V Package Includes: 1x Barometric Pressure Sensor note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.