Features: High precision. Wide Measuring Range: 50-500V for DC, meeting your needs. Small size, lightweight and compact, convenient to use. 0.56 inch digital LED display, you can see the result clearly. Voltmeter is designed for AC circuit voltage testing, such as electrical testing, voltage monitoring, and more. Specifications: Material: ABS Working Voltage: AC50~500V Voltage Measuring Range: AC50~500V, Error: ±5V Wiring: XH-2.54-2P Red and Black Wire (Thin wire total length: 155 mm) Red wire is connected to live wire and black wire is connected to neutral wire. Product Size: 47.55x28.62x20.00mm/1.87x1.12x0.79in Installation Hole: 45.50x26.07mm/1.79x1.03in Note: Please allow 1-2cm error due to manual measurement, make sure you don't mind before ordering. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Includes: 1x Main Board 1x Power