High-Definition Audio: Exquisite audio system with 52MM driver and deep bass subwoofer, gives you an ethereal experience & perfect balance between bass and melody for 10 hours. Well defined call quality : Sound Rock delivers crystal clear voice quality over the phone call with in-built mic. Size-Defying Portable Speaker: Compact and lightweight speakers can accompany you anywhere round the globe with its spring snap hook lock. Bluetooth ranging up to 10 meters.