Features: Use in vertical direction. The lines and fonts of the dial are clear. Clamping installation, equipped with two clamping part and accessory screws, convenient for installation. Light and simple product, with good practical performances, smooth appearance, crack resistant and brittleness resistant. Applicable to the power off parameters of display panels and large switch panel indicator cabinets installed in various control systems and power distribution system, such as AC and DC current, voltage, power factor, power, synchronization value, frequency, deployment voltage and overload current. Specifications: Material: Plastics Accuracy: 2.5 Working Temperature: -20 to 50 Relative Humidity: 85% Size: Approx. 82x82mm/3.23x3.23in Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Battery Voltmeter