Features: 1.Real?time monitoring of battery voltage, equipped with 12?24V voltmeter, error less than 0.5V, can correctly detect the real?time battery voltage of the car, and easily know the use of the battery. 2.The battery terminal connector has a standard 0/4/8 AWG gauge, which can connect multiple terminals of different sizes to the same terminal, and then connect the car battery to improve safety. 3.Made of high?quality aluminum alloy material, with pure copper fastening ring, it is sturdy and durable, has better conductivity, can protect the car battery terminal from corrosion, and make the battery life longer. 4.The transparent acrylic cover protects the battery terminal from the surrounding environment and effectively prevents dust. 5.With 17.5mm international standard car battery universal caliber, suitable for most car batteries. Specification: Item Type: Car Battery Terminal Connectors Kit Material: Plastic+Metal Voltage: 12-48V Power: 10W Signal to Noise Ratio: 10dB Application: Suitable for yacht, car, truck, RV, etc. PackageList: 2 x Junction Box 2 x Gasket