Features: Safety and Healthy Listening Way, Hearing Aid---wireless bone conduction technology, prevents the harm to eardrum after listening to the music for a long time. Excellent Sound Quality---high sensitive technology and the stable and perfect sound is transmitted by accessing CSR system and BT 4.1, gives you the wonderful immersed with the original. Zero-burden and Unrestraint---Unlimited freedom, light and no bound, great for the sports enthusiasts, easy and solid to wear. Ear-hook Design---flexible glue and slow rebound for comfortable to wear and not easy to fall off even when you are doing strenuous exercises. Answer the Call Freely---with key for answer the phone, supports hands-free telephone communicating whilst music playing. Lightweight and Refined---hyperelastic steel wire can be collapsible automatically and its lightweight and portable is convenient for carrying, let you enjoy the music anytime and anywhere. Powerful Battery Performance---Built-in lithium-polymer battery with the 220mAh capacity, enables you enjoy in music playing and telephone communicating up to 8 hours and 110 hours stand-by.