Electricians and maintenance personnel can use Vol-Test XL to immediately detect presence or absence of voltage before they begin working on circuit. Voltage level is shown via indicating arm while scale offers redundancy and determines if voltage is ac or dc. Testing over range of 80-600 Vac/dc, unit includes dual independent circuitry and shielded probes. Housing is ultrasonically welded and O-ring sealed to keep out dirt, dust, and moisture.