Features 1、AC voltage, ammeter same screen, double color, double display, highlight large font. 2、Simple connection of instrument:Two-wire system: no additional power supply, red and black wire connected to measure the voltage at the same time to the meter head power supply (no polarity). 3、Current testing requires no additional purchase of transformer, instrument with a high accuracy transformer. 4、In the watch head l set fine-tuning potentiometer, it can calibrate the voltage and current error by itself. 5、The head of the split‑type transformer has a back cover. It is safer, more convenient and more reliable to use. Specification Features: Fixed: the transformer is fixed on the instrument. Current testing requires no additional purchase of transformer, instrument with a high accuracy transformer. The head of the split-type transformer has a back cover. It is safer, more convenient and more reliable to use. Specification: Measurement accuracy:1% ± 2 digits Measurement speed: about 2 times per second Dimensions: Approx. 70 * 40 * 40 mm / 2.8 x 1.6 x 1.6in Installation Dimensions: Approx. 68 * 38 mm / 2.7 x 1.5in Power supply line, measuring line length: about 150mm / 5.9in "split" transformer lead length: about 100mm / 3.9in 40/5000 Operating temperature: -10 ~ + 50 ℃ Working humidity:10 ~ 80% (without condensation) Working pressure:80 ~ 106 kPa Sunlight exposure: no direct exposure Resolution:1V Current Range:AC 0~50A Resolution:1A Package List: 1*Fixed A/V Meter Note: 2. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List