We recently developed a new Tethered system for DJI Drones... LIFELINE Tethered UAV for DJI Drones . Singapore is a place full of no-fly zones.. many places are within 5km of an airport, considering that we are such a small country. The system works well if you need persistence power for live-broadcasting and first responders. We try to make it as affordable as we can for pilots who need to tether your DJI drones for important missions. Do check us out and we are here to help!