Features: Top-class Samsung special audio processing unit giving superexcellent acoustical enjoyment; Imported polarized lenses provides the most thoughtful protection for eyes in the world; Support of 128MB/256MB/512MB memory Support of MP3/WMA/ASF diversified musical format and VBR compression; USB2.0 high-speed interface with faster and convenient transfer; Freely telescoping boom speakers, 270 ?㦮bsp; rotatable, freely adjustable and comfortable wearing; Max. Volume: 88db with a better sound quality; Built-in Li battery provides 6-hour continual playing and 100-hour idle time. Effectively obstruct the ultraviolet rays, glare and harmful blue lights and clear vision at each random angle; Suitable for various operating platform and potable with compact size.