A. This is a unique automotive audio accessory - the AFS fuse holder, also known as a fuse and fuse box, which features a digital display function. The product adopts a mini - design, being delicate and compact. In the limited interior space of a vehicle, it doesn't take up much room but can play an important role. B. It uses an ordinary car charger and a wired charging method, which are very common and stable charging ways. It can be compatible with most vehicles, ensuring convenient use in various driving scenarios. C. It adopts a "one - to - one" insurance mode. This design is precise and efficient, providing reliable insurance protection for the car audio system. It can effectively prevent circuit failures from damaging the audio equipment, allowing your car audio to always maintain a stable working state. The digital display function adds a sense of technology and practicality to the product, enabling you to keep track of the insurance status at any time and clearly understand the power consumption of the car audio. D. Whether for daily commuting or long - distance travel, this fuse holder can provide protection for your car audio and is a good choice for enhancing the car audio experience.