The FCC has proposed a fine of more than $2.8 million against HobbyKing, a company that sells transmitters that transmit audio and video from unmanned aerial vehicles (drones). The FCC also issued an enforcement advisory warning manufacturers and users of drones and drone accessories that they must comply with FCC rules or risk significant penalties. The FCC said it “has observed a surge in websites advertising and selling” drone transmitters that do not comply with its rules, so additional enforcement actions are likely.