... the identical scale class range, scale-change can be conducted without loss of accuracy or damaging the meter .Mounting: Surface ... -55Hz,45-65Hz,55-65Hz,47-53HzSFT-560Power factor meter(cos)Voltage:110V,220V,380V,440V current:1A or ... -1-0.1ind,0.7cap-1-0.2indSFT-50Power meter (Kw or kvar)Voltage:110V,220V380V.440V current:1A ... meters. Welcome your inquiries! SFT series Analog Ampere Meter range 600A