Stanley Intelli Tools Fatmax Non-Contact Voltage DetectorThe Stanley Intelli Tools FatMax Non Contact Voltage Detector can be used to detect voltage or non contact metals up to 20mm. Allows you to check voltage in a circuit without contact. The integrated sensitivity adjustment allows you to narrow down the search area of live voltage. Specification: AC Voltage Range: 20 1000V Metal Detecting Distance: <20mm Safety Rating: CAT III 600V & CAT II 1000V