Practical Audio Coche Adapter Receiver Intentional Craftsmanship Portable Handsfree Speaker Car Supplies Multifunctional 3.1a Shell material: aluminum alloy + PC Product color: silver/gold/black Total output: 15.5W (MAX) USB1 output: 5V-3.1A (MAX) (smart shunt) USB2 output: 5V-3.1A (MAX) (intelligent shunt, play MP3 music) Quality certification: CE Product weight: 40g (including packaging) Specifications: [with digital display] with LED display to display car battery voltage, hands-free call, FM transmission, Bluetooth 5.0 lossless connection, music, navigation broadcast, U disk MP3 playback [Dual USB Interfaces] Dual USB interfaces supply power at the same time, built-in management chip, intelligent shunt and fast charging will not hurt the machine [Intentional craftsmanship] It is made of aluminum alloy material and the streamlined design of the casing, which is processed by 18 processes such as CNC machining, polishing, sandblasting, oxidation, and laser engraving. [Circuit protection, safe to use] 5-layer circuit protection of high-performance main control chip is adopted, which is safer to use together. [Wide applicability] Metal elastic contact design, suitable for different sizes of cigarette lighters, can carry 12V/24V wide voltage input, compatible with most models on the market, compatible with a wide range of matching, smart phone, Bluetooth and tablet, At the same time meet the charging of the main and auxiliary drivers Package Included: 1*car charger