Minelab GO-FIND 40 Metal Detector Retracting detector with simple 1-button press/Length to suit everyone in the family Powered by 4 x AA batteries/Intuitive user interface One button selects target types Green LEDs indicate non-iron metal (eg. silver or gold) | Red LEDs indicate iron target (nail) [GO-FIND 40 & 60 only] Visual icon flashes detected target/High tone for high value metal target | Low tone for iron target