4 Way Fuse Block is heat resistant and flame retardant. 2 wrenches are provided to make installation easier. Amplifier Power Distribution Nuith Car Audio Power Distribution Block 0/4 Gauge Input 4/8 Gauge Out 4 Way Mini Anl Fuse Block 12v With Ground 2 Way In 4 ANL Fuse Distribution When one or more fuses are blown, the red light will light up and help you identify the status of the fuse. NuIth Car Audio Power Distribution Block 0/4 Gauge Input 4/8 Gauge Output, 4 Way Mini ANL Fuse Block 12V with Ground, 2 Way in 4 Way Out Fused Distribution Block with Red LED Indicator. 2 wrenches are provided to make installation easier When the lights remains extinguished, all is well. 4 Way Fuse Block is universal for car, boat, RV or other vehicles. Connection terminal made of zinc alloy. When one or more fuses are blown, the red light will light up and help you identify the status of the fuse and easily replace the blown one. Fused distribution block 2 in 4 out include 6 mini-anl fuses. 10 To 4 Awg Car Audio Power Distribution Block - Free Shipping Worldwide Dual anl fuse holder distribution block used to connect the audio power cable to the audio system to prevent excessive current and fuse block automatically cut off when the current is too strong. Q: How do I know if the NuIth distribution block is functioning properly?A: The red LED indicators will light up if a fuse is blown. If all lights are off, the block is functioning properly Reliability and Practicality: The black base and transparent shell design with high-quality plastic, which is durable and protects the equipment from external damage.