MP3+Bluetooth+Sunglasses 1. Support MP3/WMA/WAV 2. Can be used as USB Disk 3. Bluetooth,10 meters working distance 4. Built-in Lithium battery(can be recharged via PC or charger) 5. Polarized lens is a material that blocks 100% of all UVA, UVB, UVC and harmful blue light 6. Memory capacity:64MB-1GB flash memory Color:Silver/Black/White/Military/Blue/Yellow