1Real?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. 2The 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. 3Made 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. 4The transparent acrylic cover protects the battery terminal from the surrounding environment and effectively prevents dust. 5With 17.5mm international standard car battery universal caliber, suitable for most car batteries.2 x Junction Box2 x GasketItem Type: Car Battery Terminal Connectors KitMaterial: Plastic+MetalVoltage: 12-48VPower: 10WSignal to Noise Ratio: 10dBApplication: Suitable for yacht, car, truck, RV, etc. 1Real?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. 2The 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. 3Made 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. 4The transparent acrylic cover protects the battery terminal from the surrounding environment and effectively prevents dust. 5With 17.5mm international standard car battery universal caliber, suitable for most car batteries.2 x Junction Box2 x Gasket