Features: The newly launched small and economical digital LED dopuble voltage measuring instrument is mainly used to measure the input and output voltage in the voltage regulator, inverters and Pressure regulator circuit in and display it in LED digital direct reading modes. Widely used in substation automations, distribution automations, detection equipment, voltage regulators, and other occasion. The product has high precisions, high stability, high reliability, low power consumption, small size, and convenient installation, making it a good product to replace various type voltage measurements. This instrument is only suitable for AC50-60HZ mains power supply and cannot be used for measurement on square, inverters output, and correction circuits, otherwise the instrument will be permanently damaged! Measurement ranges: AC50 to three hundred Specifications: Material:ABS Measurement ranges: AC50-three hundred Auxiliary power supply: AC50-500V Size:Approx.70mm/2.75''x40mm/1.57''x25mm/0.98'' Note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Voltmeter