The Dark Shadow MP3 sunglasses with voice recording can store more than 60 songs and can play up to 8 hours (MP) playback time with a fully charged battery. The lightweight frame will give you all-day comfort. The glasses are 100% UV protected, shock proof and anti-static. The state-of-the-art audio technology ensures an incredible sound! With the high speed USB cable you can easily transfer music files from your PC.