"Connect wirelessly or with AUX Cable in your phone with your favourite Music with Muffs Pro on-ear Headphone. It uses latest Bluetooth 4.1 which works much better with 4G than Bluetooth 4.0 does. This means no interference with mobile 4G signals. Bluetooth 4.1 also conserves battery power much better for longer playtime and also gives ""automatic reconnection"" to devices which were earlier paired without the need to manually reconnect every time. Range up to 33 feet (10 meters) allows you to remain connected to your music and calls. Simply switch between phone calls and music with the touch of a button. Control volume, play & pause, next & track back directly from the headphone buttons."