QC3.0&PD Dual USB ports with charging speed up to 20W, intelligently identify different devices and deliver the optimal current.Large speaker unit and dual mic with CVC noise cancelling for clear hands-free calls. Dual microphones work in tandem to collect your voice from all directions, while the latest CVC 8.0 noise reduction technology blocks out more road noise, wind noise and other distractions.Two music playback modes: Bluetooth 5.3 connection and U-disk (U-disk not included).The outer circle is made of premium aluminum alloy that's exquisite texture, durable, better heat dissipation, safer than plastic. Equipped with digital display to show you the condition of your car battery.Widely compatible with all bluetooth enabled devices such as smartphones and tablets.