The yellow port with QC mark means this port supports QC3.0 protocol, working with phone that supports quick charge, and the common usb port charges phone at current up to 2.4A.
Featuring bluetooth 4.2, it is able to be compatible with most mobile phones, ideal for home or vehicle audio systems.
Color LCD screen shows volume, frequency, connected device and information of audio that is being played.
2 USB ports for charging and connecting device, also supports TF card whose storage memory is less than 32GB for music playing.