... phase,frequency,phase sequence,power 2.Upload Data:RS232 ETCR 4400 Three Phase Digital Phase Meter Features:Simultaneously measure three-phase AC voltage, current, phase, frequency, phase ... battery),acuminate current clamp about 170g×3, roundcurrent clamp about 185g×3, test line about 250gTest Line ... Unit: 1pc; Meter Box: 1piece; Current Clamp: 3 pcs; Test Line: 4pcs(yellow, green, red,black ...