Optimal Conductivity: 12 place fuse box for ATC/ATO fuses (medium size); car fuse holder has a positive and negative side, which means for every positive terminal screw, there is a negative terminal screw. Max. 32V DC operating voltage. Max. 30 Amps per circuit and 100 Amps per panel. High Quality Material and Safety: Made of PBT, this 12v blade fuse box is mechanically strong, insulating, heat resistant, which ensures you a safe to use and help you get rid of problems such as breakage, deformation, burning or short circuit. Adds extra protection to your fuse box and fuse box. Unique LED Safety Indicator: Auto car fuse holder with warning light, fuses themselves are blown when the current is too high, and the red light will turn on immediately. so you can easily determine the short circuit or any other fault and fix the error effortlessly. Wide Usage: Comes with multi-function stickers to DIY your specific need , convenient for examination and repair, easy to troubleshoot outdoor; widely used in vehicle, car, marine, bus, ship, tanker, underground etc.