LED Whip Lights. 12V Fuse Relay Box 6 Way Pre-Wired Waterproof Relay Box 6 Slot ATC/ATO Fuse Relay Block Universal Relay Panel for Automotive Car Marine Boat. Protection and Safety - Every circuit is protected by a total of 8 ATC/ATO blade fuses (including 3A, 5A, 7.5A, 10A, 15A, 20A, 25A, 30A options), ensuring your devices are safeguarded against overcurrent.