TempPro TP357W Bluetooth hygrometer allows you to monitor your home environment remotely. Via the TempPro App, you can monitor the temperatuer and humidity from up to 260ft away. Set the suitable temperature and humidity monitor range for your room, greenhouse, humidor, cellar and instantly receive notifications on your phone once the temp or humidity levels go beyond the set range. The interface features a face icon indicator to inform you of room climate at just a glance.