The protective dry case is an advanced protection solution designed to protect all kinds of precision electronic equipment and important instruments. It is suitable for storing cameras, drones, recording devices, radios, sports cameras, compact projectors, and audio devices, as well as small parts, wires, memory cards, batteries, wallets, cell phones, keys, and other accessories(all excluded), that are widely used in various fields such as instrumentation, gauges, security, electronics, electric power, communications, aerospace, chemical industry, nuclear power, exploration, scientific research, transportation, photography, troopers, unmanned aerial vehicles,and expedition, and can be applied in camping, scuba diving, hiking, kayaking, rowing or mountaineering.