Tempo Wireless Environment Monitor and Weather Station for iOS, Android and optional Web Access with Free Apps, 12 Months Warranty - Temperature, Humidity and Barometric Pressure Sensors and Data Logger - For Home and Business - Marble Wireless environment monitor and weather station which continuously monitors temperature, humidity and barometric pressure. Displays current values on a user's smartphone and also logs and timestamps values in its onboard memory for when users are away or not in range. Compatible with iOS and Android smartphones and tablets with free powerful apps for long term recording, graphing and statistical analysis. No wires, cables, wifi set-up or separate hub device required - simply turn it on and download the free apps - done ! Cannot be easier or quicker. Tempo is highly portable - move it from room to room, place it outside or carry it with you - the ultimate in flexible deployment. Includes powerful sensors that can be separately calibrated with accuracies of +/- 0.3 Celsius for temperature, 5% RH for humidity and 2 hPa for pressure. Data logging frequency can be changed from the default of hourly to as frequently as once every 5 minutes. Data can be easily extracted from the device and can be uploaded straight from a smartphone by way of .csv or .pdf formats, both for the raw data but also for the graphs and statistic summaries.