The prototype watch looks like an everyday watch, but is able to communicate with the patient's home network over WLAN and has two unobtrusive emergency call buttons on the sides. The watch has an OLED color display, four buttons for navigation and operation, a vibrating alarm and a loudspeaker. Users can control the lights in their apartment remotely or they will get an alert when leaving the apartment - for example if windows are open or the stove is on. An acceleration sensor similar to those in used smart phones works like a pedometer, tracking the activity of the wearer. The first users have given the watch positive marks for its easy-to-read display, but would like to have more functions, such as a calendar for doctor's appointments or a function that reminded them to take their medication. They would also like a controller for the video conferencing system used in the test. The specific range of functions can be expanded using freely programmable apps.