JAZZA&reg; Over-Ear Rotatable Stereo Active Noise Reduction Cancelling Headphones Bluetooth Wireless Headset for Travel (Black) 1.Newest Stylish Designed: Bluetooth and noise cancelling combine design, unique in the world market. Designed of separating the line and the headphone.The user can select 4 working status freely as Bluetooth headphone, noise cancelling headphone, normal headphone and HIFI headphone Chime in with the noise cancelling normal switch. 2.JAZZA Advanced Technology: Built-in advanced ANC circuit, cwith the 23db noise level, and it can effective to cut off 95% background noise.Bluetooth Version 4.1 sport stereo headphones, suitable for wireless music and calling. 3.Quality Sound & Comfortable Wearing: Crystal clear sound (Special speaker transmits high fidelity and detailed wireless sound to your ears).With the design of all cover protein lether ear cups, with the imported sponge, comfortable and long wear no fatigue. 4.Convenient to use: Built-in Lithium battery can be chargeable, work time more than 40hours, no need change battery.Compatible with Bluetooth digital device as smart phones, Pad, Tablets, PC, MP3, MP4 ,etc. Ps: Please slowly rotate to change the angle when you folding the headphones. 5.What you get: A packaged box including 1x Active noise cancelling headphone,1x Bluetooth Stereo receiver, 1x Carrying Bag, 1x Aircraft adapter,1x connecting wire,1x USB cable,1x User Manual,and worry-free 18-month warranty and friendly customer service.