Application instructions for the Dräger Gas Detection Training App The Dräger Gas Detection Training App simulates various gas measuring devices in a trainer/trainee situation. The devices must be on the same WLAN (e.g. "hotspot" of a smartphone) to conduct training. Use with one mobile device: If you only have one mobile device available, use demo mode to simulate gas alarms from gas measuring devices on a mobile device. Use with multiple mobile devices: To start trainer or student mode, you