By plane [edit]. The largest gateway for air travel is Frankfurt Main airport in central Germany, which offers connections to all continents and to most airports in Europe. Zurich, Munich, Vienna and Warsaw airports are a lot smaller but provide good connections to selected regional and intl. destinations.
To connect via Bluetooth, first turn on your phone or tablet's Bluetooth. When you use a new Bluetooth accessory, pair it with your phone or tablet. After pairing, devices can connect with each other automatically. Important: On a tablet that people share, each person can change the overall Bluetooth settings.
Bluetooth can connect up to eight devices simultaneously. With all of those devices in the same 10-meter (32-foot) radius, you might think they'd interfere with one another, but it's unlikely. Bluetooth uses a technique called spread-spectrum frequency hopping that makes it rare for more than one device to be transmitting on the same frequency at the same time.