Portable flex

Just imagine a completely portable flex. Waterproof box about the size of a book or maybe a folded laptop. The only connectors are a bnc and a DC power input. (probably a usb-c, well because).... You connect your favorite antenna and a battery. Take out your phone with your Bluetooth earbuds, open the app and BAM, your on the air..... What could be better, absolutely nothing. Flex would shortly own the portable market..