Parameter: Input voltage: 12-24V Output parameters: 5V 4.8A Item model number: A9 Display screen: LED blue light display Support expansion: U disk / mobile phone Bluetooth Bluetooth version: Bluetooth 5.0 Transmit frequency: 87.5-108.0 MHz Features : 1. Car battery voltage monitoring with LED display. 2. Dual USB ports supply power at the same time. 3. Built-in management chip, intelligent shunt and fast charging will not hurt the machine. 4. It is made of aluminum alloy material and the streamlined design of the shell through 18 processes such as CNC machining, polishing, sandblasting, oxidation, laser engraving, etc. 5. Using high-performance main control chip 5-layer circuit protection, it is safer to use together. 6. Metal elastic contact design, suitable for cigarette lighters of different sizes, can carry 12V/24V wide voltage input, compatible with most models on the market. 7. Compatible with a wide range of matching, smart adaptation of mobile phones, Bluetooth and tablets, while satisfying the charging of the main and auxiliary drivers. 8. Support OEM, ODM, custom LOGO and packaging. Precautions 1. The charger will be hot during use. It is normal at normal room temperature not exceeding 60 degrees. 2. When the charger is over-current, over-stable, and short-circuit protection, it will stop working. 3. Do not strongly impact this product. 4. Do not soak this product in water. 5. Do not modify or disassemble this product. 6. Avoid charging in places with high temperature or sun exposure. Too high temperature will affect the charging effect.