Specification:Brand newVoltage: 12-24VThe battery terminal connectors have 0/4/8 AWG gauge input, which can connect multiple different sizes to the same terminal and then connect the car battery.It keeps all the cables safe, neatly in place, in the same direction and one position, perfect fit for battery terminals.Equipped with a 12-24V voltmeter with an error of less than 0.5V, can correctly detect real-time battery voltage of the car.Adopts the standard international car battery 17.5mm universal caliber.Suitable for most car batteries.Fine workmanship.Easy to use.Durable in use.Package Included:1pc x Positive Battery Terminal Connector1pc x Negative Battery Terminal Connector2pcs x Transparent Acrylic Covers2pcs x Copper Fastening Rings Return Policy All of our items come with a 30-day free return policy. If you need to return, please contact us, let us know the detailed problem and send us some pictures for confirmation. We reserve the right to refuse any returns for objective reasons. Shipping Policy All of our items are shipped free with tracking numbers. Orders will be shipped within 3 working days upon receipt of payment. Most orders will be shipped within 1 working day. In most cases, shipping takes 8-12 working days.