Parveen demonstrating from our centre in Chennai. Often the teacher and demonstrator are not in the same location. This can help solve problems related to network signal and wifi strength. Running two devices from one network may be difficult in some locations, so having a demonstrator in other city helps quite a bit. If the power goes out in one location, the demonstrator is able to continue teaching the class until power is restored. "Flexible" has taken on a new meaning!