Meckwell Provide this headphone have high bass with suround sound. This headphone Have Memory Card Slot so You can play song with your memory card. this headphone have in built FM Radio So you can enjoy FM also. This Headphone Is wirelss so you play song with Bluetooth device or Your smart Phone .. Battery Backup have long and if battery is not charge you can attach your smart phone with 3.5 mm Jack Aux cable with this headphone... This headphone have Calling Button So you can attend your Incoming call or reject your call with just a single Touch.... So Why you people wait for ... enjoy this headphone . Content in TheBox... Headphone , Charging Cable.