Features: Protections function: With overvoltage, undervoltage and overcurrent protections, when the Voltages and current are too high or too low, the protections function will be activated. Voltages display (Voltages measurement): You can see the Voltages value clearly and intuitively. Current display (current measurement): current value can seen clearly and intuitively. Easy to install: none additional tool are need, and the installation process is very convenient. LCD screen: The LCD display is clear and easy to read, and the data can be read directly. Specifications: Materials: Plastic Current: 40A/63A Size: about 85x37mm/3.35x1.46inch Reset/extension time: 1~999S Adjustable overvoltage ranges: AC130~300V Adjustable ranges of undervoltage: AC80~210V Package Includes: 1pc Voltages Protectors 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.