Features: 100% brand new and high quality Car battery voltage monitoring with LED display, dual USB ports for power supply at the same time, built-in management chip, intelligent shunt fast charging without hurting the machine. The aluminum alloy material and the streamlined design of the shell are processed by 18 processes such as CNC machining, polishing, sandblasting, oxidation, and carving. It adopts high-performance main control chip 5-layer circuit protection, which is safer when used together. Metal elastic contact design, adapt to different sizes of cigarette lighter ports, can carry 12V/24V wide voltage input, compatible with most models on the market. Compatible with wide matching, smart adaption to mobile phones, bluetooth-compatible and tablets, and at the same time to meet the charge of the main and co-drivers.