Bluetooth Headphones, Jelly Comb HIFI Bluetooth Stereo Wireless + Wired Headphones with Passive Noice Reduction & Hands-free Calling features Can be used both wired (stereo audio only) and wirelessly ; Serve as both a Wireless music headphone and Bluetooth phone headset for hands-free calling. Rich and dynamic sound with enhanced deep bass and great clarity from the acoustically advanced, high efficiency 40mm driver. Foldable design for easy storage and travel. Soft leatherette ear cushions let you listen to your entertainment in extreme comfort, even during long hours of extended wear. Long working distance: 15 meters ( 49.2 ft )