1. Size: Diameter 3.6 x H1.6cm.

2. Retractable length 88cm.

3. It adapt hi-stereo speaker, could let you enjoy authentic music, don't tired your ears for long time.

4. To use silica gel earpiece, also let your ears comfortable when listen.

5. Special clip design, usage of hang and grip, it could be upon neck, belt, pocket, and bag; etc.

6. The cost lowest than wireless and reduce the usage of radiated products, and to avoid harm of electromagnetic wave.

7. It could solve the trouble of clean cable of wired products, it is quickly clean and collect, and convenient to carry with you.

8. “Unilateral Retractable Device”, it have got formal patent license at this unilateral retractable device, selling in USA, Europe and Japan now.

9. The unilateral retractable device applied to your products, to increase your function and added value, it is fit in with diversification and distinction at your promoting.