The TFA Dostmann 604508 is a digital thermometer and hygrometer that measures both temperature and humidity levels in a room or outdoor environment. It features a large, easy-to-read display and can be mounted on a wall or placed on a desk or table. This device is perfect for those who want to monitor the temperature and humidity levels in their home, office, or greenhouse. By using a screen protector on the display, users can ensure that the device remains protected from scratches and other damage, allowing them to continue to use it for years to come.