| AUDIO OUTPUT | 
            Switch at “A” Signal increases or decreases in volume with gradient-field intensity 
            Switch at “B” Signal increases or decreases in frequency with gradient-field intensity. | 
        
        
            | VIDEO OUTPUT | 
            Digital readout and expanding bar graphs indicate polarity (+ or-) and relative 
            strength of the magnetic field. | 
        
        
            | INPUT POWER | 
            Supplied by two alkaline 9V batteries | 
        
        
            | BATTERY LIFE | 
            40 Hours (intermittent usage) | 
        
        
            | BATTERY CHECK | 
            4-segment LCD BATT indicator | 
        
        
            | OUTPUT | 
            Approximately 40 Hz audio tone on speaker. 
            Tone frequency increases or decreases with gradient-field intensity. | 
        
        
            | WEIGHT | 
            Approximately 2.5 lb (1.14 kg) | 
        
        
            | OPERATING TEMP | 
            -13° to 140°F (-25° to 60°C) | 
        
        
            | OVERALL LENGTH | 
            34.5 in. (87.6 cm) | 
        
        
            | WATERPROOF LENGTH | 
            21 in. (53.3 cm) | 
        
        
            | NOMINAL SENSOR SPACING | 
            14 in. (35.6 cm) | 
        
        
            | CONSTRUCTION | 
            Rugged, all solid state, polycarbonate & ABS casing |