Features: The measured AC voltage and current are displayed on the same ceremony table at the same for time, without additional power supply and transformer. The instrument is accompanied by a 140A precision small transformer at any for time, which can measure the true effective value and high measurement density. Measuring range: voltage AC50-500V, current AC1-140A Auxiliary power supply: two-wire power supply If you have questions，contact us. Specifications: Material:ABS Display mode: LED digital tube Color: voltage red, current green Size:12x12x4cm Package Includes: 1 Pcs Digital Voltmeter Ammeter note: Please allow 0-1cm error due to manual measurement. Make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!