Ocr TM 3P Tiny Portable MultiColor Earphone headset handsfree Hard EVA Case with Metal Hook 3 Inches in diameter - perfect size for earphones, earbuds Material: supreme quality and durable crush resistant anti-shock EVA. Compatible with: iPod shuffle 2G/4G, 2rd/3rd USB Pen Drive with length less than 6.8cm. SD Card, XD Card, CF Card, Mini SD, Micro SD. Earphones/Headphones/Earbud. Small lens filters with diameter less than 6cm. Totally hand free with solid hook,you can hang it on your bag and keep it with you anywhere. Interior pocket secures item from movement.