Ring Automotive RMS4 This unit has been designed to aid the motorist with his power requirements . As we use more and more devices in a car we end up with less and less place to plug them in which is how the Ring RMS4 came into being. the Unit Boasts the following features 3 Accessory sockets Battery analyser to show power charge level Illuminated Cigarette lighter socket Coiled power cable with fused plug Mounting arms for permanent fixing Maximum current rating 8amp