Phase Sequence and Motor Rotation, CAT Safety Rating CAT III 1000V, CAT IV 600V, Display Screen Type LCD, Display Type Digital, For Voltage Range 40 to 850 VAC (15 to 400Hz), Includes (3) 4 ft Color-Coded Test Leads (Red/Black/Blue), (3) Alligator Clips, Carrying Case, Maximum Frequency 400 Hz, Minimum Frequency 15 Hz, Testing Functions Phase Rotation, Phase Voltage Presence, Alert Type Digital Display, Battery Chemistry Not Applicable, Battery Size Not Applicable.