Our Synergy HD Wireless Headphones feature Active Noise Cancellation, so you can focus on what's important and eliminate unwanted background noise.  Simply turn off the ANC if you want to hear what is happening around you.  We designed our Bluetooth Headphones with the Qualcomm aptX HD Sound Codec for a truly immersive experience. Enjoy listening to the finer details of your music or movies in high-definition sound with powerful bass and experience the subtle nuances of better than CD quality.  Built on the Bluetooth 5.0 platform, our Wireless Headphones can communicate as Bluetooth low energy devices, providing a stronger signal for better stability and improved battery life of up to 40 hours.  We engineered our Bluetooth Headphones with USB Type-C fast charging and a specialized battery that charges 50 percent faster. In the rare case that your Wireless Headphones run out of power, a 15-minute quick charge will provide up to 5 hours of use.  Our design is amazingly comfortable to inspire you to work longer and play harder, we engineered the ear cushions with a protein leather wrap, sourced from Korea, to simulate the natural feel of leather on your skin, then we added plush memory foam inner cores to surround your ears in comfort while reducing ambient room noise.  The end result is a premium set of Wireless Headphones, that we think you just might love.