1. Keep All the Cables Safe and Tidy - The 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 is safer and more aesthetically pleasing, fits perfectly on the battery terminal. 2. Real-time Monitoring 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. 3. Effectively Extend the Service Life of the Battery - Made of high-quality material, coupled fastening ring, which is strong and durable, with better electrical conductivity, can protect the car battery terminals from corrosion, make the battery last longer. 4. Better Protection - With transparent acrylic covers, it can effectively prevent dust and damage from the surrounding environment, better protect the wires and battery terminals. 5. Strong Versatility - The standard international automobile battery 17.5mm universal caliber is adopted, suitable for most car batteries. Item Type: Fastener & Clip Item Weight: 0.2kg Model Name: Car Battery Terminal Connectors Feature: Strong Versatility colour:Silver Material:Aluminum alloy size:Caliber: 17.5mm Package Contents: 1 x battery terminal (positive/with electronics) 1 x lid 1 x fixing ring Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.