| AUDIO OUTPUT | 
            Signal increases in frequency with gradient field intensity. Idle frequency = 10 Hz | 
        
        
            | DISPLAY OUTPUT | 
            Expanding bar graph indicates polarity (positive or negative) and relative signal strength | 
        
        
            | BATTERY INDICATOR | 
            4-segment LCD | 
        
        
            | GAIN | 
            Adjustable Gain with range indicated by a 4-segment LCD | 
        
        
            | GAIN MEMORY | 
            Gain defaults to Medium when powering off/on | 
        
        
            | VOLUME | 
            3 Levels: Muted, Medium, and High | 
        
        
            | INPUT POWER | 
            Supplied by one 9V Alkaline Battery | 
        
        
            | BATTERY LIFE | 
            24 Hours (intermittent usage) | 
        
        
            | OPERATING TEMPERATURE | 
            -13°F to 140°F (-25°C to 60°C) | 
        
        
            | OVERALL LENGTH | 
            32-1/2 in. (83 cm) | 
        
        
            | NOMINAL SENSOR SPACING | 
            20 in. (50 cm) | 
        
        
            | WEIGHT | 
            Approximately 2.6 Lbs (1.2 Kg) | 
        
        
            | CONSTRUCTION | 
            High impact ABS | 
        
        
            | DUST & WATER PROTECTION | 
            Rated IP54 (when operated with headphone jack plug installed into jack) |