You should consider the Vanquish 340 as water-resistant and not waterproof. Although you'll find that its V10 10" x7" Double-D search coil is waterproof to a depth of 3.3 feet (1m), Minelab recommends not submerging its Vanquish-series metal detectors in water.   You can freely use the Vanquish 340 in moist environments like mud, wet sand, rain, or spray. The control box isn't waterproof, but you'll get your detector with an attached Rain Cover.