About 5 hours each morning. Got the real pretty antique silver ring Friday. Saturday I got a 10k 1969 class ring & 14k earring & bracelet. Sunday yielded some silver. Thin ring, religious metal, 1924 merc, & a 1943 war nickel (my 1st) Pretty good for some New England beaches. This Sand Shark can def find the goods, I couldn't be happier with it.