Features High-Quality Performance: Designed for accuracy and durability, ensuring reliable readings for both voltage and current measurements in various applications Split-Type Installation: Features a separate transformer for easy setup, allowing flexible positioning to suit your specific measurement needs Convenient Two-Wire System: Simplifies connections by using just red and black lines, eliminating the need for additional power supply connections Integrated High Precision Transformer: Provides accurate current testing without the need for extra purchases, making it cost-effective and efficient User-Friendly Calibration: Equipped with a fine-tuning potentiometer for easy self-calibration of voltage and current errors, enhancing measurement precision Features: 1、100% and high-quality. 2、Split-type: easy to install, the transformer is separated from the instrument, and the transformer can be installed according to the actual position of the measurement. (It can lengthen the lead at the second end of the transformer to reach the ideal ins 3、Two-wire system: No need to connect the power supply, red and black lines to measure the voltage at the same time to the meter head power supply (no need to split polarity). 4、Current testing requires no additional purchase of transformer. The instrument is equipped with a high precision transformer. 5、In the watch head, l-set fine-tuning potentiometer can calibrate the voltage and current error by itself. Specification: Features: 100% and high-quality. Split-type: easy to install, the transformer is separated from the instrument, and the transformer can be installed according to the actual position of the measurement. (It can lengthen the lead at the second end of the transformer to reach the ideal installation position). Two-wire system: No need to connect the power supply, red and black lines to measure the voltage at the same time to the meter head power supply (no need to split polarity). Current testing requires no additional purchase of transformer. The instrument is equipped with a high precision transformer. In the watch head, l-set fine-tuning potentiometer can calibrate the voltage and current error by itself. Specification: The range of voltage measurementNo direct exposure Package List: 1 * Current voltmeter head 1 * mutual inductance coil 1 * Adapter Note: The wiring sequence of the instrument is: the circuit of the current loop is connected first, the 220V voltage is finally connected, after connecting the 220V power supply, it can not touch any parts and circuits behind the instrum Package List