Dual independent fast charging design: supports dual USB ports (such as Type-C + USB-A), can charge two devices at the same time, and both support smart fast charging protocols (such as PD/QC), compatible with mobile phones, tablets and other devices, with a maximum output power of more than 30W. Convenient retractable cable storage: built-in 1m-1.5m retractable charging cable (or magnetic cable), eliminating the trouble of traditional data cable entanglement, one-click retraction, saving space in the car and keeping it tidy. Super fast charging technology: equipped with high-voltage and low-current solutions or dynamic power allocation, adapted to mainstream fast charging protocols (such as SCP, AFC), can charge the mobile phone to more than 50% in 30 minutes, and the charging efficiency is increased by 40%. Safety protection system: built-in overvoltage, overcurrent, short circuit and temperature protection, passed automotive-grade certification (such as CE/FCC), metal shell heat dissipation design, high temperature resistant and flame-retardant materials, to ensure long-term safety. Multi-function car charging interface: compatible with 12V/24V light, extended USB interface or wireless charging module (some models), supports LED indicator to display working status, and more intuitive operation at night. Specification: Type: Car MP3 Player Quantity: 1 PC Material: ABS Color: As Shown Use voltage: 12V-24V Interface type: dual USB interface BT version: stereo Output current:3.1A Launch distance: <5m Frequency range: 87.5-108MHz Support expansion: U disk <32G, TF card <32G The package contains: 1pcs * car BT player