The HOBO MX1104 multi-channel data logger measures and transmits temperature, relative humidity, and light intensity data wirelessly. It also includes an external analog input to attach a variety of additional sensors. This self-contained wireless data logger lets you use your mobile device or Windows computer and Onset's free HOBOconnect app to access data, at any time, over a 100-foot range via Bluetooth technology. You can configure the logger, read out data, view data in graphs, check the operational status of loggers, configure alarm notifications, and share data files - all with no dedicated equipment beyond a mobile device or laptop. And if used with the new MX Gateway, you can remotely access your data in Onset's cloud-based HOBOlink® software.