Frazer Zhang is the director at SunAgri. 

In this video, he explain a bit more about the product they sell. Their drones can spray as much as 1000 hectares.

You are able to charge their products, which makes your battery usage low. It also has huge tanks!

For more information, contact +260-776982370 or send an e-mail to sunagritechnofarming@gmail.com.