**Product dimension : 190*85.5*75mm
**Colors: black, iron-gray
**USB specification: micro USB
**LINE-IN: 3.5MM
**Case material: Metal
**Mirror surface material/color: Loudspeaker with steel net/iron-gray
**Function key: Push the system switch, VOL+, **Next, VOL-, previous, call
**Power on/off : Push the system switch
**Loudspeaker :the magnetic core 20
**Speaker unit: 50mm
**3D stereo sound: Press vol+ and vol- simultaneously