ZEB-Duke 101 is a wireless headphone has a lightweight and ergonomic design that features an adjustable headband & foldable earcups that make it travel-friendly. The headphone has a call function button and controls for media/volume along with voice assistant support. It has support for an SD card and has a built-in FM Radio. Now Play your music for longer with a playback time of 12 hours*. For any product related query, service and warranty contact 9360942527 or write to support@zebronics.com. For any product related query, service and warranty contact 9360942527 or write to support@zebronics.com