Features: Display the AC voltage and current simultaneously by LED digital tube. Din-rail installation and easy measurement, just connect to power and lead the wire through the hole. Wide voltage and current measurement range. Used to monitor the operation situation of appliances. Specifications: Measurement range: AC 80-300V 0.2-99.9A Power supply: < 0.2V*A Installation: Din-rail Accuracy: 1% ± 2digit Measurement speed: about 2 times per second Display type: 0.5" LED digital tube Display size: 5 * 4cm / 2 * 1.6in Installation width: = 3P (DZ47/C45, air switch position) Product size: 8 * 5.5 * 6.5cm / 3.1 * 2.2 * 2.6in Product weight: 124g / 4.4oz Package size: 8.8 * 7.4 * 6.1cm / 3.5 * 2.9 * 2.4in Package weight: 144g / 5.1oz Package including: 1 * Digital Din-rail AC Voltmeter / Ammeter