-Different types of metals including iron, relics, coins, etc can be identified. The closer to the target metal, the stronger the signal on the meter. SPECIFICATIONS -Adujastable stem, suitable for different height people. -Endurable ABS material. -8" Waterproof search coil. -Audio visual indicator. -Adjustable pointer display. -Erogonomic Light weight design, comfy for long time use. -Power source: Battery powered.