The SmartTRAK is the smart choice for locating ferrous metal objects- manholes, steel covers, septic systems, corner survey markers, cast iron pipes, iron valves, and re-bar. The ST101 series feature one-handed operation with pinpoint accuracy and large visual display. Precision-crafted superior ergonomics and balanced design for one-handed operation Large LCD screen for visual search results 0-99 numeric indicator with signal strength bar graph, North/South polarity indicator, and battery level indicator High-grade waterproof speaker is water resistant and dust proof to ensure years of dependable operation Robust co-molded housing is water resistant and dust proof to ensure years of dependable operation Waterproof tube (IP67) and tip for locating even in the toughest environments and weather conditions