Professional manufactory supplying MP3 Sunglass, MP3 Bluetooth sunglass, Bluetooth sunglass, MP3 LCD Sunglass,which enjoy a good market in Euorpe, North America. 1) Unique design: combines digital music MP3 player and polarized lens 2) Polarized lens: blocks 100% of all UVA, UVB, UVC and harmful blue light 3) Supports MP3, WMA and WAV format 4) Memory capacity: 128MB / 256MB / 512MB / 1GB 5) Earphone adjustment: can adjust earphone extenders to fit users' ears 6) Built-in lithium-ion polymer battery: 3.7V, 150mAh, up to 4.5 hours' continuous play time