"The virtual mobility part of blended mobility is mostly supported through the use of information and communication technologies (e.g. Skype, Adobe Connect, Slack, Google Hangout, Trello) to stay connected with the teachers and/or students who may be situated at many distant locations. The physical mobility part is typically of short-term duration, ranging from 2 to 14 days. There may exist multiple periods of short-term mobility. Short periods of physical mobility enable participants to focus for a couple of days only on the actual project, which is difficult in daily life in a local environment."
Link: https://en.wikipedia.org/wiki/Blended_mobility