Bluetooth sensor measures temperature, humidity and motion. 

• - The IP67 certified RuuviTag Pro (4in1 and 3in1) comes with a breathable membrane that enables air humidity and air pressure monitoring. It tolerates temporary wet conditions and it’s a good choice to outdoor use. The 4in1 and 3in1 models are for non-condensing uses only.
• - Measurement resolution is 0.01 °C, while absolute accuracy is astounding at ±0.1 °C across the temperature range of –20 to +50 °C, with no calibration.
• - RuuviTag Pro has two strong mounting ears that allow reliable installation methods to be used. Wooden ceilings, gyproc walls, concrete foundations, you name it. Attach and measure professionally wherever you need to.
• - RuuviTag Pro’s casing and electronics are designed to operate without interruption in a wide range from -40 to +85 °C.
• - Humidity accuracy: Typical absolute accuracy tolerance ±2 % (20...80 % relative humidity, 25 °C).
• - Bluetooth built in. Ruuvi Station mobile app is available on Android and iOS.

RuuviTag is an open source sensor platform that measures temperature, air humidity, air pressure and acceleration. With the Ruuvi firmware application, Ruuvi sensors continuously broadcast sensor data at 0,8 Hz and simultaneously log environmental sensor data at a 5 minute interval for 10 days. Sensors are refreshed by default at 0,4 Hz. This means that 2 consecutive broadcast messages have the same sensor data. In most uses, battery lifetime is normally 1-2 years.