Description: Made of high-quality aluminum alloy material, coupled pure copper fastening ring, which is strong and durable, with better electrical conductivity, can protect the car battery terminals from corrosion, make the battery last longer The transparent acrylic cover protects the battery end from damage from the surrounding environment and effectively prevents dust. Real-time the Battery Voltage, Equipped with a 12-24V voltmeter with an error of less than 0.5V, can correctly detect the real-time battery voltage of the car, and easily understand the use of the battery 17.5mm international standard car battery universal caliber, suitable for most car batteries The battery terminal connector has standard 0/4/8 AWG Gauge, which can connect multiple terminals of different sizes to the same terminal, and then connect the car battery for more safety. Specification: Spacer Shims : Includes 2 Adjustable Shims,Satin Nickel Finis +/- Battery Terminals Clearly Marked with (+) Positive or (-) Negative for Easy Polarity Identification Satin Nickel Finish (2) 0/4 Gauge Input (2) 8/10 Gauge Inputs The maximum diameter of the positive electrode is 18, the maximum diameter of the negative electrode is 17 Wiring hole: 2GA-10GA IN (in) -2GA-10GA OUT (out) Weight: 0.38kg / pair Size: 70x50x23mm / 2.76x2x 0.9 inch Package Includes: 1 x Car Battery Terminal with Voltmeter(Positive ) 1 x Car Battery Terminal (Negative) 2 x Spacer Shims 2 x Car Battery Terminal Covers