WESPC Original GV13T Generator Digital Voltmeter Frequency Hour Test Panel Meter Working power supply AC185 ~ 265V (220 VAC system) Power consumption MAX:1 W Temperature -30℃ ~ 70℃ Cumulative operation time 0-9999h Current running time 0-999.9h Size (W * H * D) 58mm * 54mm * 41mm Installation Size(W * H) 47mm * 37mm Weight 55G Summary GV13T is one light and low price-orientated module used for checking and demonstrating Voltage, Frequency and accumulating time of generator.