- 1-way fuse box with ground bus: crafted with high-quality materials and careful attention to detail for efficient, reliable operation. LED indicators provide clear status. - Wide compatibility: can be connected directly to the power lines of electrical appliances on cars or ships, including car roof lights, car headlights, wide-view lights, fog lights, warning lights, car refrigerators, car fans, and car TVs. - Safe and durable materials: built from environmentally friendly, low-temperature flame-retardant materials. The unit provides good mechanical strength, insulation, heat resistance and flame resistance; under operating conditions it should not crack, deform, ignite or short circuit. - Easy fuse monitoring and replacement: features a negative bus to quickly identify and replace blown fuses without guessing. The LED lights up when a fuse is blown, making inspection and replacement safe and straightforward.