iFlex flexible current probe (sold separately) expands the measurement range to 2500 A ac while providing increased display flexibility, ability to measure awkward sized conductors and improved wire access CAT IV 600 V, CAT III 1000 V Propietary inrush measurement technology to filter out noise and capture motor starting current exactly as the circuit protection sees it Ergonomic design fits in your hand and can be used while wearing personal protective equipment Large, easy to read backlight display automatically sets the correct measurement range so you do not need to change the switch positions while taking a measurement Soft carrying case