EXTECH MA435T-NIST Clamp Meter, TRMS, NIST, 400A. More details: Clamp Meter, Digital, Clamp Meter Jaw Style Clamp On, Max. AC Amps 400, Max. DC Amps 400, Max. AC Volts 600, Max. DC Volts 600, Max. Ohms 40 megohm, Jaw Capacity 1-13/64 In., Temp. Range -4 Degrees to 1400 Degrees F, Counts 4000, Battery Type 9V, Safety Rating CAT III 600V, Calibration Certificate NIST, AC Response TRMS, Audible Continuity Yes, Diode Test Yes, Capacitance 100micron F, Frequency Counter 10 kHz, Display Backlit LCD