Syllable Portable D50 Bluetooth V3.0 Car Wireless Cordless HD Voice Handsfree Mono Headset Headphone Earphone with Micphone for Driver iPhone Samsung HTC LG Blackberry & More Smartphones (White) Single or Couple: You can use only one piece or two together to pursue perfect stereo music experience. It depends on your usage habit. (Note: the primary headset R, the secondary headset L) Near Pairing: The headset is automatically connected to the left and right: the factory has completed the primary and secondary headset pairing connection. Large Power Capacity: The containing box is also the charging station. It offers at most 6 times' full charge to the two wireless headsets. Comfortable to Wear: The shape of the earbuds fits your auditory meatus perfectly. With silicone earmuffs, the headsets stay firmly in your ears when working out or running or doing exercise in the gym. What you will get: One couple D900S Bluetooth headsets, one eco-pouch, USB charging cable, string, user manual, ear buds.